Little is known about Dirk, and historians have often confused him with his father and son.
|Offspring of Dirk I bis van Holland and Gerberga van Hamaland (c890-c940)|
|Dirk II van Holland (930-988)||930||6 May 988||Hildegard of Flanders (935-990)|
|Wichman IV van Hamaland (c935-974)||935||974||Luitgard of Flanders (941-964)|
| Count of Frisia west of the Vlie