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 Comte Thierry III d'ALSACE de LORRAINE
	Birth	about 1099	Alsace, Alsace-Lorraine, France
	Death	17 January 1168	Gravelines, Département du Nord, Nord-Pas-de-Calais, France
	Burial		l'Abbaye de Watten, Saint-Omer, Départment Pas-de-Calais, Nord-Pas-de-Calais, France
	Marriage	1134	Alsace-Lorraine, France
	Father	Comte Thierry II "le Vaillant" d'ALSACE
	Mother	Gertrude de FLANDRE
WIFE Sybille d'ANJOU de FLANDRE
	Birth	about 1115	Anjou, Département d'Isère, Rhône-Alpes, France
	Death	about 1165	Monastère de Béthanie (Saint-Lazare de Jérusalem), Israel
	Burial		Abbaye Saint-Lazare, Bethléem, Israel
	Father	Foulques V "Fulk or Fulco "The Surly"" d'ANJOU (Roi de JÉRUSALEM)
	Mother	Comtesse Ermentrude "Ermengarde" du MAINE
CHILDREN
M	Comte Matthieu I d'ALSACE
	Birth	about 1137	Vlaanderen, België
	Death	25 July 1173	Driencourt, Département de la Somme, Picardie, France
	Marriage	1160	Comtesse Marie de BLOIS; Département Pas-de-Calais, Nord-Pas-de-Calais, France
F	Comtesse Marguerite d'ALSACE
	Birth	1145	Château de Male près de Bruges, Belgique
	Death	15 November 1194
	Marriage	1169	Comte Baudouin V "le Courageux" de FLANDRE d'HAINAULT; Le Quesnoy, Avesnes-sur-Helpe, Département du Nord, Nord-Pas de Calais, France