Ancestral Roots of Certain American Colonists Who Came to America Before 1700, page 116
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24. FULK V, 'the Young,' Count of Anjoy, King of Jerusalem, b. 1092, d. at Jerusalem, 10 Nov. 1144; m. (1) 1110, Erembourg, Countess of Maine d. 1126, dau. of Helie de la Fleehe, Count of Maine; m. (2) 2 June 1129, Meliserde de Rethel, d. 11 Sept. 1161, eldest dau. of BALDWIN II (103A-25), King of Jerusalem (by whom he was father of Baldwin III, King of Jerusalem, b. 1130, d.s.p. 10 Feb. 1162, and of Amaury I, King of Jeresalem, b. 1136, d. 11 July 1124). (NEHGR 99: 34-37; ES II/82, III.4/692).
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Count of Anjou
Fulk was born at Angers, between 1089 and 1092, the son of Count Fulk IV of Anjou and Bertrade de Montfort. In 1092, Bertrade deserted her husband and bigamously married King Philip I of France.
He became count of Anjou upon his father's death in 1109. In the next year, he married Ermengarde of Maine, cementing Angevin control over the County of Maine.
He was originally an opponent of King Henry I of England and a supporter of King Louis VI of France, but in 1118 or 1119 he had allied with Henry when he arranged for his daughter Matilda to marry Henry's son and heir, William Adelin. Fulk went on crusade in 1119 or 1120, and became attached to the Knights Templar (Orderic Vitalis). He returned, late in 1121, after which he began to subsidize the Templars, maintaining two knights in the Holy Land for a year. Much later, Henry arranged for his daughter Matilda to marry Fulk's son Geoffrey of Anjou, which she did in 1127 or 1128.
https://en.wikipedia.org/wiki/Fulk,_King_of_Jerusalem