He is married to Hildegarde van West-Friesland.
They got married in the year 950, he was 18 years old.Sources 1, 2
Child(ren):
Conde de Frise e Gand, Count of Holland/West Friesland, graaf van West-Friesland, Comte, de Hollande, de Westfrise, de Gand, Conde de Westfriesland e Ghent (962), Count, Earl of Holland and Maasland (939-988).