Today is the 109th anniversary of Bennett's birth. He died in 1971, at the age of 73.
With the death of Phyllis Cerf Wagner at 90 last November he's survived by his two sons, Jonathan and Christopher.
Christopher Cerf is a composer and producer, perhaps best known for his association with the kid's shows Sesame Street and Betwen the Lions. Christopher has won multiple Emmys and Grammys. He was one of the founders of National Lampoon and has published several humorous/satiric books.
Jonathan Cerf, who co-wrote Big Birds Red Book with his wife, was President of Harvard Lampoon, the progenitor of the National Lampoon. In 1980 he was the first non-Japanese to win the World Othello Championship. I've tried to play that game - I'm impressed.
They're both in their 60's.