Paul Howard was the son of Felisa Howard, the husband of Isabel Howard, and the father of Beverly Howard (later Crusher).
As a child, Beverly often found herself getting in trouble with her parents because of her tendency to speak without thinking. (TNG: "Attached")
Paul and his wife both died when Beverly was very young, leaving Beverly's grandmother Felisa to care for her. (TNG: "Conundrum", "Sub Rosa")
Paul's name was briefly glimpsed on Beverly's personnel file in "Conundrum". The circumstances surrounding the death of Beverly's parents are vague.