The Dutch and American Gase and related families

The Family Tree of the American Gase, Moermond, Boes, Steigmeyer, Elchert, Nye and Yost families
The Family Tree of the Dutch Gase, Van Stein, Weder, Van der Fluit, Mortel and Moermond families
Family Group Sheets
(compiled by Ronald A. Gase. Please email me for corrections, additions, questions or if you have special personal requests)
Tree currently contains 154,002 individuals and 65,753 families.
(site updated Saturday, October 24th, 2025)
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Family Group Sheet

HUSBAND Gerrit JONKMAN
	Birth	8 May 1936	Groningen, Groningen, Nederland
	Death	17 February 2021	Stockbridge, Hampshire, England, UK
	Marriage	28 December 1961
	Father	Hendrik JONKMAN
	Mother	Pieterdina "Dina" JONK
WIFE Janna Machteld "Jannie" de BOER
	Birth	14 December 1938	Amsterdam, Noord-Holland, Nederland
	Death	29 November 2015	England, UK
	Father	Siebren de BOER Jr.
	Mother	Janna HOBRECKER
CHILDREN
F	Yolanda JONKMAN
	Birth	1 November 1962	Amsterdam, Noord-Holland, Nederland
	Marriage	27 July 1991	Patrick Manuel LONG; Salisbury, Wiltshire, England, UK
F	Yvonne Pieterdina JONKMAN
	Birth	21 March 1964	Amsterdam, Noord-Holland, Nederland
	Marriage	11 August 1985	Philip John "Phil" HALL; Salisbury, Wiltshire, England, UK
	Marriage		James "Jim" NORTON;
M	Taco Frederik Hendrik JONKMAN
	Birth	4 July 1965	Amsterdam, Noord-Holland, Nederland