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 Jean I d'AVESNES d'HAINAULT
	Birth	1 May 1218	Houffalize, Luxembourg, Belgique
	Death	24 December 1257	Valenciennes, Département du Nord, Nord-Pas de Calais, France
	Marriage	September 1246	Nassau, Germany
	Father	Comte Bouchard IV d'AVESNES d'ÉTROEUNGT
	Mother	Comtesse Margaret II de FLANDRE d'HAINAULT
WIFE Comtesse Aleidis "Aleida" van HOLLAND
	Birth	22 September 1225	's-Hertogenbosch, Noord-Brabant, Nederland
	Death	9 April 1284	Valenciennes, Département du Nord, Nord-Pas de Calais, France
	Father	Graaf Floris IV van HOLLAND
	Mother	Gravin Mathilde "Machteld or Maud" van BRABANT
CHILDREN
M	Comte Jean II d'AVESNES d'HAINAULT
	Birth	about 1247	Mons, Hainaut, Belgique
	Death	22 August 1304	Valenciennes, Département du Nord, Nord-Pas de Calais, France
	Marriage	about 1270	Comtesse Philippina de LUXEMBOURG-MAAS; Valenciennes, Département du Nord, Nord-Pas de Calais, France