Ritske Jelmera was a Frisian chieftain born in 1383 in
Ternaard,
Friesland, who ruled the island of
Ameland before dying in 1450 (testated January 17). His
stins (stone house) stood near
Ballum. His descendants through his great-grandson Pieter went by the family name
Cammingha.
Sources and references
Burmania, Upcke van, Frisicae nobilitatis genealogia, Rijksarchief Friesland, Leeuwarden, Van Eysinga-Vegelin van Claerbergen Family Archive, inventory no. 1323b.
Verhoeven, G., J.A. Mol, and H. Bremer, Friese Testamenten tot 1550, Leeuwarden: Fryske Akademy, 1994.