5/1/1218, John d’Avesnes born in Houffalize [Luxembourg], illegitimate s/o 23638800. Bouchard IV of Avesnes & 23638801. Margaret II of Flanders. [John illegitimate because his parents marriage was dissolved by the Pope.]
~1230, Adelaide born in Holland, d/o 23638802. Count Floris IV of Holland & 23638803. Matilde of Brabant.
7/19/1234, Adelaide’s father murdered.
3/1243, John and his brother Baldwin declared legitimate by Emperor Frederick II.
1244, John’s father executed on the orders of his maternal aunt Joanna.
12/5/1244, John’s mother Magraret inherited Flanders and Hainaut, designating William III of Dampierre, her son by her 2nd husband, as heir – starting the War of Succession of Flanders and Hainaut.
1246, King Louis IX of France intervened in the war, giving Hainaut to John d’Avesnes and Flanders to William de Dampierre. [Neither side accepted the decision.]
[––John & Adelaide––]
10/9/1246, John married Adelaide; becoming Count of Hainaut.
5/19/1250, A peace agreement was made between Flanders and Hainaut.
1251, John’s half-brothers were legitimized by the Pope on the request of their mother.
6/6/1251, William III assassinated by arrangement of John.
7/4/1253, John’s forces, with support of his brother-in-law William II, King of Germany, defeated the forces of his mother and her 2nd son Guy de Dampierre at the battle of West-Capelle [Walcheren]. Guy was taken prisoner. [Guy, John’s half-brother was married to Isabelle de Luxembourg, his son’s wife’s sister.]
1254, Charles, Count of Anjou, was offered the county of Hainaut by John’s mother for his invasion. Charles laid siege to Valenciennes.
7/26/1254, Charles ended the siege with a negotiatied agreement that the dispute would be settled by King Louis IX.
1256, King Louis required his brother Charles to renounce any claim on Hainaut.
1256, John was a supporter of Richard of Cornwall being elected King of the Romans. (S) John of Avesnes and Richard of Cornwall, Lucas, 1948.
11/22/1257, Due to support of Adelaide’s brother William, elected King of the Romans [Germany], and of King Louis IX of France, Guy relinquished Hainaut to John.
12/24/1257, John died in Valenciennes, France.
1258-63, Adelaide, Regent of Holland.
~1260, Adelaide commissioned the epic poem “Alexander Geestern” by Jacob van Maerlant.
4/7/1284, Adelaide’s mother died.
4/9/1284, Adelaide died, buried in Valenciennes.
Child of John and Aleide:
i. John II d’Avesnes (5909700), born 1247 in Holland.