What is Dirk I of Holland?
[[File:Diederik, eerste hertog der West-Friezen Didericus. Dux Frisiae Occidentalis Primus (titel op object) Koningen en Potestaten van Friesland (serietitel) Frisia, sev, de Viris (serietitel op object), RP-P-OB-50.632.jpg|thumb|Dirk of holland ]] '''Dirk I''' was [[Count of Holland|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. [[Category:9th-century births]] [[Category:10th-century deaths]] [[Category:Counts of Holland]] {{bio-stub}}