geoffrion's widow marlene is the daughter of fellow hockey hall of famer howie morenz and the granddaughter of the sister of the wife of billy coutu, the only player banned from the nhl for life. geoffrion's son dan (born january 24, 1958) played five seasons of professional hockey, which included stops with the quebec nordiques of the world hockey association in 1978–79, canadiens in 1979–80 (with his father as coach), and winnipeg jets in 1980–81. his grandson blake geoffrion (born february 3, 1988) played for the nashville predators and montreal canadiens in the nhl. dan's younger sons, sebastian and brice, played for the university of alabama in huntsville chargers. geoffrion's son-in-law, hartland monahan, played in the nhl for several teams in the 1970s, and his grandson shane monahan played major league baseball for the seattle mariners in the late 1990s.