Eugene Stoner was my second cousin. Genealogy is a hobby of mine, and I'd like to fill in some unknows, such as where he was educated, the maiden name of his first wife, where and when they were married and divorced, the birthdates and places of birth of his children, etc.

My grandmother and his grandmother, Laura Eastes Stoner were sisters-in-law and good friends,and I have inherited some innocuous postcards written by the latter.

You can find a biography here:

http://www.spiritus-temporis.com/eugene-stoner/

Thanks for the tip.
I also have a copy of his obituary, which has more information, but am still lacking the maiden name of his first wife, Jean, date and place of marriage, and birthdates of their children.
Apparently his father, Lloyd Stoner, moved the family to California in the late 1920s, then moved back to Indiana and remarried in the 1960s.