Anseau of Garland (1069-1118), son of William I of Garlande and his wife Havoise. Count of Rochefort-en-Yvelines. Seigneur of Gournay-sur-Marne, Pontault and Berchères. Seneschal of France under Louis VI from 1108 to 1118. It is unclear when Anseau was count, although it is likely that he assumed the title after his brother-in-law Guy II the Red died in 1108.
His appointment as seneschal was disputed by Fulk V, Count of Anjou, who considered the position as belonging to his family. The issue was resolved through the intervention of Amaury III of Montfort (his future son-in-law), Geoffrey of Vendôme and Raoul de Boisgency.
Legend has it that in 1115, Anseau and his niece Yolande were crossing the forest Roissy-en-Brie 0n horseback when a boar attacked them. They were rescued by a clown and a peasant who were rewarded for their bravery by a plot of land in the forest.
Anseau first married a daughter (name unknown) of Guichard de Beaujeu III and Lucienne de Rochefort. His second wife was Beatrice of Montlhéry, daughter of Guy I of Montlhéry and Hodierna of Gometz. Anseau and Beatrice had one daughter:Agnès de Garlande (1112-1143), countess of Rochefort, Lady of Gournay-sur-Marne and Gometz. Agnes married Amaury III of Montfort and had three children.
Anseau was killed in 1118 by a spear by Hugh III of Le Puiset, during the third siege of the castle of Puiset in Beauce.