"William I (c. 1167 – 4 February 1222) was the count of Holland from 1203 to 1222. He was the younger son of Floris III and Ada of Huntingdon." - (en.wikipedia.org 09.04.2021)
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(The left column lists the relations of this actor to objects in the right column. In the middle you find other actors in relation to the same objects.)