William I (Count of Holland)
William I (c. 1167 – 4 February 1222) was count of Holland from 1203 to 1222. He was the younger son of Floris III and Ada of Huntingdon.
William I (c. 1167 – 4 February 1222) was count of Holland from 1203 to 1222. He was the younger son of Floris III and Ada of Huntingdon.