American Pickwicks

I have added Robert Holley Pickwick to the data base. He was the son of Walter E Pickwick and Laura A Holly.  Robert was a patrolman (policeman to any UK readers) in New York.  Sadly he died in an accident in 1960 at the young age of 37.  I know he left a widow, Ingrid and two children (names not known yet).  I wonder if there are any descendants out there somewhere?