Brothers

• Bergey
  Bill Bergey
  William Earl Bergey is a former American collegiate and Professional Football player. He played collegiately for Arkansas State University and for the American Football League's Cincinnati Bengals and the NFL Philadelphia Eagles....
  
  : Jake
  Jake Bergey
  Jake Bergey is a retired lacrosse player. Bergey played ten seasons for the Philadelphia Wings in the National Lacrosse League. Bergey is the son of former NFL star Bill Bergey, and brother of fellow lacrosse player Josh Bergey.-NLL:Bergey joined the Philadelphia Wings in 1998...
  
   and Josh
• Bomberry: Cam, Cory, and Tim
• Dawson: Dan
  Dan Dawson
  Dan Dawson is a Canadian lacrosse player who plays for the Philadelphia Wings of the National Lacrosse League and formerly of the Hamilton Nationals of Major League Lacrosse.-NLL career:...
  
   and Paul 
• Evans: Shawn, Steve, and Scott 
• French: Mike and Paul French
• Gait: Gary
  Gary Gait
  Gary Charles Gait is widely regarded as the best lacrosse player of all time, just above his twin brother Paul. He has starred at the NCAA level at Syracuse University, at the professional level in the National Lacrosse League and Major League Lacrosse, and at the international level for the...
  
   and Paul
  Paul Gait
  Paul Gait is widely regarded as one of the best lacrosse players of all time and is the current Vice President of the Rochester Knighthawks of the National Lacrosse League...
  
   
• Greer: Bill and Zack
  Zack Greer
  Zack Greer is a Canadian lacrosse player who plays for the Long Island Lizards in Major League Lacrosse and the Edmonton Rush of the National Lacrosse League. Greer attended high school at All Saints Catholic Secondary School in Whitby, and grew up playing box lacrosse...
  
   

• Jenner: Teddy
  Teddy Jenner
  Teddy Jenner was a box lacrosse player for the Victoria Shamrocks in the Western Lacrosse Association as well as a number of teams in the National Lacrosse League from 2002 to 2007. He is now a lacrosse analyst.He now hosts the only radio show in Canada specifically focused on the game of lacrosse...
  
   and Fred
• Kilgour: Darris
  Darris Kilgour
  Darris Kilgour is the head coach and general manager of the Buffalo Bandits of the National Lacrosse League. Kilgour also played for the Bandits for 8 seasons, before finishing his playing career with the Rochester Knighthawks and Albany Attack. He won three championships with the Bandits, and is...
  
  , Richie, and Travis
• Malawsky: Curt
  Curt Malawsky
  Curt Malawsky is a former box lacrosse player and currently the Assistant General Manager and Assistant Coach of the Calgary Roughnecks of the National Lacrosse League...
  
   and Derek
  Derek Malawsky
  Derek Malawsky is a lacrosse player for the Edmonton Rush in the National Lacrosse League...
  
   
• Martin: Spencer and Andrew
• Merrill: Brodie
  Brodie Merrill
  Brodie Merrill is a Canadian lacrosse player. He currently plays in the National Lacrosse League for the Philadelphia Wings and Major League Lacrosse for the Hamilton Nationals.-High school career:...
  
   and Patrick
  Patrick Merrill
  Patrick Merrill is a lacrosse player for the Toronto Rock in the National Lacrosse League and formerly of the Toronto Nationals in Major League Lacrosse.-Professional career:...
  
   
• Montour: Ken
  Ken Montour
  Ken Montour is a professional box lacrosse player in the National Lacrosse League with the Buffalo Bandits...
  
   and Tom
• Morgan: David, Richard, and Peter
• Peyser: Greg
  Gregory Peyser
  Gregory Peyser is an American professional lacrosse player with the Long Island Lizards of Major League Lacrosse. Peyser also played with the Orlando Titans and New York Titans of the National Lacrosse League. He played collegiate lacrosse at Johns Hopkins University...
  
   and Stephen
  Stephen Peyser
  Stephen Peyser is an American professional lacrosse player with the Long Island Lizards of Major League Lacrosse. Peyser also played with the Orlando Titans and New York Titans of the National Lacrosse League...
  
   
• Powell: Casey
  Casey Powell
  Casey Powell is a lacrosse player in the United States. He was the captain of the US national team in the 2006 World Lacrosse Championship. He currently plays indoor lacrosse in the National Lacrosse League for the Rochester Knighthawks. He also plays Major League Lacrosse for the Hamilton...
  
   and Ryan
  Ryan Powell (lacrosse)
  Ryan Powell , is an American lacrosse player from West Carthage, New York. He was a four-time All-American at Syracuse University. He currently plays for the Boston Blazers of the National Lacrosse League and the Denver Outlaws of Major League Lacrosse. His brothers Casey and Mike also have enjoyed...
  
   
• Sanderson: (players) Ryan and Chris
  Chris Sanderson
  Chris Sanderson is a lacrosse coach and current member of the Canadian team defending their world championship.. Sanderson was an assistant coach for the Philadelphia Wings in the National Lacrosse League from 2005 to 2007 season. Sanderson played for parts of five seasons as a goaltender.Chris is...
  
  , also Brandon, Phil
  Phil Sanderson
  Phil Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League and formerly of the Toronto Nationals of Major League Lacrosse...
  
  , and Nate
  Nate Sanderson
  Nathan "Nate" Sanderson is a Canadian lacrosse player. Sanderson played for the Toronto Rock in the National Lacrosse League during the 2008 NLL season and signed with the Calgary Roughnecks for the 2009 NLL season. Sanderson is one of a number of Sandersons in the NLL, including his brother Phil...
  
   
• Sanderson: (coaches) Terry, Lindsay, and Shane
• Self: Scott and Brad
• Snider: Geoff
  Geoff Snider
  Geoff Snider is a Canadian lacrosse player from Calgary, Alberta, Canada. He is known as a dominant faceoff man and a very physical player...
  
   and Bob
• Squire: Kim and Rodd
• Suddons: Derek and Wes
• Tavares: John
  John Tavares (lacrosse player)
  John Tavares is a professional box lacrosse player in the National Lacrosse League and mathematics teacher at Philip Pocock Catholic Secondary School in Mississauga Ontario, Canada. He attended D'Youville College in Buffalo, NY.Tavares has played his entire career with the Buffalo Bandits since...
  
   and Peter
• Wray: Devan and Taylor
  Taylor Wray
  Taylor Wray is a Canadian lacrosse player who plays for the Philadelphia Wings of the National Lacrosse League...
  
   

Fathers - Sons

• Castle: J.R. Castle
  J.R. Castle
  James "J.R." Castle of Glenside, Pennsylvania, is a former American lacrosse player with the Philadelphia Wings of National Lacrosse League. A William Penn Charter School graduate, Castle played collegiate lacrosse with the Drexel Dragons, after transferring from the now-defunct North Carolina...
  
   and George Castle
  George Castle (lacrosse)
  George Castle from Glenside, Pennsylvania, is an American lacrosse player with the Philadelphia Wings of National Lacrosse League. He is a defensive midfielder...
  
   
• Sanderson: Terry and Josh
  Josh Sanderson
  Josh "Shooter" Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League....
  
   
• Sanderson: Lindsay and Phil
  Phil Sanderson
  Phil Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League and formerly of the Toronto Nationals of Major League Lacrosse...
  
  , Brandon, Nate
  Nate Sanderson
  Nathan "Nate" Sanderson is a Canadian lacrosse player. Sanderson played for the Toronto Rock in the National Lacrosse League during the 2008 NLL season and signed with the Calgary Roughnecks for the 2009 NLL season. Sanderson is one of a number of Sandersons in the NLL, including his brother Phil...
  
  

Cousins

• Sanderson: Ryan and Chris
  Chris Sanderson
  Chris Sanderson is a lacrosse coach and current member of the Canadian team defending their world championship.. Sanderson was an assistant coach for the Philadelphia Wings in the National Lacrosse League from 2005 to 2007 season. Sanderson played for parts of five seasons as a goaltender.Chris is...
  
   (brothers), Brandon, Nate
  Nate Sanderson
  Nathan "Nate" Sanderson is a Canadian lacrosse player. Sanderson played for the Toronto Rock in the National Lacrosse League during the 2008 NLL season and signed with the Calgary Roughnecks for the 2009 NLL season. Sanderson is one of a number of Sandersons in the NLL, including his brother Phil...
  
   and Phil
  Phil Sanderson
  Phil Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League and formerly of the Toronto Nationals of Major League Lacrosse...
  
   (brothers), Josh
  Josh Sanderson
  Josh "Shooter" Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League....
  
   

Uncles - Nephews

• Sanderson: Lindsay and Chris
  Chris Sanderson
  Chris Sanderson is a lacrosse coach and current member of the Canadian team defending their world championship.. Sanderson was an assistant coach for the Philadelphia Wings in the National Lacrosse League from 2005 to 2007 season. Sanderson played for parts of five seasons as a goaltender.Chris is...
  
  , Josh
  Josh Sanderson
  Josh "Shooter" Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League....
  
  , Ryan 
• Sanderson: Terry and Brandon, Chris
  Chris Sanderson
  Chris Sanderson is a lacrosse coach and current member of the Canadian team defending their world championship.. Sanderson was an assistant coach for the Philadelphia Wings in the National Lacrosse League from 2005 to 2007 season. Sanderson played for parts of five seasons as a goaltender.Chris is...
  
  , Phil
  Phil Sanderson
  Phil Sanderson is a lacrosse player for the Toronto Rock in the National Lacrosse League and formerly of the Toronto Nationals of Major League Lacrosse...
  
  , Ryan, Nate
  Nate Sanderson
  Nathan "Nate" Sanderson is a Canadian lacrosse player. Sanderson played for the Toronto Rock in the National Lacrosse League during the 2008 NLL season and signed with the Calgary Roughnecks for the 2009 NLL season. Sanderson is one of a number of Sandersons in the NLL, including his brother Phil...
  
   
• Veltman: Jim
  Jim Veltman
  Jim "Scoop" Veltman is a former lacrosse player who played for the Toronto Rock, the Ontario Raiders, and the Buffalo Bandits in the National Lacrosse League...
  
   and Peter, Daryl
  Daryl Veltman
  Daryl Veltman is a Canadian lacrosse player. He is currently a member of the Calgary Roughnecks in the National Lacrosse League.-High School/College career:...
  
   
• McCready: Pat
  Pat McCready
  Pat McCready is a Canadian lacrosse player who plays for the Toronto Rock in the National Lacrosse League.-NLL career:McCready made his professional lacrosse debut in 1996 with the Charlotte Cobras...
  
   and Joel

Brothers-in-Law

• Mike Hasen and Pat O'Toole
  Pat O'Toole
  Patrick "Toole Time" O'Toole is the goaltending coach for the Rochester Knighthawks in the National Lacrosse League and a retired goaltender...
  
   
• Bill and Zack Greer
  Zack Greer
  Zack Greer is a Canadian lacrosse player who plays for the Long Island Lizards in Major League Lacrosse and the Edmonton Rush of the National Lacrosse League. Greer attended high school at All Saints Catholic Secondary School in Whitby, and grew up playing box lacrosse...
  
   and Dan
  Dan Dawson
  Dan Dawson is a Canadian lacrosse player who plays for the Philadelphia Wings of the National Lacrosse League and formerly of the Hamilton Nationals of Major League Lacrosse.-NLL career:...
  
   and Paul Dawson (Bill Greer married Dawson's older sister)