Dirk I was count of West Frisia, later known as the County of Holland. He is thought to have been in office from c. 896 to c. 928 or 939. Wikipedia
Born: 875 AD
Died: 939 AD (age 64 years)
Parents: Gerolf of Holland
Grandparent: Gerulf I of Frisia
Children: Dirk II, Count of Holland
Partner: Gerberga van Hamaland and Geva
Great grandchildren: Dirk III, Count of Holland, Adelina of Holland, Siegfried (Sicco) of Holland, and more