Guy first married Elisabeth from an unknown family. He then married Adelais de Crécy, widow of Bouchard II, Count of Corbeil, grandson of
Mauger, Count of Corbeil. Guy and Elisabeth had three children:
Guy III (d. 19 November 1115), Count of Rochefort. His son Simon (d. before 1125) was also Count of Rochefort.
Biote de Montlhéry, married Folques, Vicomte of
Château-Landon.
Guy and Adelais had three children:
Hugh of Crécy (d. 31 July 1147). Seigneur de Gournay. Seneschal of France under Robert II, 1106-1107. He apparently helped his father in his rebellion and was forced to flee, becoming a monk at the
Cluny Abbey.
Lucienne (1090-6 May 1138), married first to
Louis, son of Philip I, and later king of France (annulled by the Council of Troyes on the grounds of consanguinity,) and second to Guichard IV, Seigneur de Beaujeu. No children are recorded from first marriage. The second marriage produced children.
Beatrix (1105-after 1168), married first Manasses de Tournan-en-Brie and second Druex, Seigneur de Pierrfonds.
He was succeeded by his son Guy III and then his grandson Simon as Count of Rochefort.
Sources
Riley-Smith, Jonathan, The First Crusaders, 1095-1131, Cambridge University Press, London, 1997