John I References John I count of Holland Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: HollandAt that time John I of Avesnes, count of Hainaut and a relative of John I, the last of the old house of the counts of Holland, took the title of John II of Holland, uniting Holland with Hainaut to the south. Read MoreAt that time John I of Avesnes, count of Hainaut and a relative of John I, the last of the old house of the counts of Holland, took the title of John II of Holland, uniting Holland with Hainaut to the south. Read More