Petronilla of Alsace
Countess consort of Holland (1113 - 1121)
Dowager Countess (1121 - 1144)
Also called Gertrude
Born (c1090) - Died May 24, 1144)

Father - Thierry of Alsace
Mother - Hedwig of Formbach

Petronilla married (1113) Floris II of Holland
Children :

• Dirk VI of Holland (c1114 - Aug 5, 1157)
• Hedwig of Holland (Hadewig) (c1115 - 1132) nun at Rijnsburg - bur Church of St Maria, Haarlem
• Floris the Black of Holland (c1116 - Oct 26, 1132) - killed ar Abstede
• Simon of Holland (c1119 - Nov 7, before 1144)