Gervase of Ebstof is best known as the author of the Ebstorf Map

Ebstorf Map

The Ebstorf Map is an example of a mappa mundi similar to the Hereford Map, made by Gervase of Ebstorf, who was possibly the same man as Gervase of Tilbury, some time in the thirteenth century....

, a medieval mappa mundi

Mappa mundi

Mappa mundi is a general term used to describe medieval European maps of the world. These maps range in size and complexity from simple schematic maps an inch or less across to elaborate wall maps, the largest of which was 11 ft. in diameter...

 created in around 1234.

He may or may not be the same man as Gervase of Tilbury

Gervase of Tilbury

Gervase of Tilbury or Gervasius Tilberiensis was a 13th century canon lawyer, statesman and writer, apparently born in either East Tilbury or West Tilbury, in Essex, England.-Life and works:...

, author of Otia Imperialia, "Recreation for an Emperor", written for Emperor Otto IV.

The connection between Gervase of Tilbury

Gervase of Tilbury

Gervase of Tilbury or Gervasius Tilberiensis was a 13th century canon lawyer, statesman and writer, apparently born in either East Tilbury or West Tilbury, in Essex, England.-Life and works:...

 and Gervase of Ebstof can "only remain hypothetical"; the arguments for Gervase of Tilbury

Gervase of Tilbury

Gervase of Tilbury or Gervasius Tilberiensis was a 13th century canon lawyer, statesman and writer, apparently born in either East Tilbury or West Tilbury, in Essex, England.-Life and works:...

being the mapmaker are based on the name Gervase, which was an uncommon name in Northern Germany at the time and on some similarities between the world view of the mapmaker and Gervase of Tilbury.