I'm not sure this falls in to being a 'factoid', but I found it interesting, and didn't know until I just read it.
In 1968, Allen's father, Frank, was shot dead on his front lawn by a cab driver. Nobody knows why Frank was murdered or what his connection was to the killer. In 1975, Allen's sister, Karen, was at a Red Lobster parking lot when she witnessed an attempted robbery. Because the thieves were worried that she could identify them, they slit her throat. But the tragedy didn’t stop there. his two half-brothers were killed in a freak scuba accident five years later. That means that Allen lost four family members in three different incidents over 12 years. But it gets worse. His best friend, David Angell, was killed during 9/11. Then in 2009, his friend of 40 years, was murdered by his wife. He didn’t have many people to turn to when he was dealing with these tragedies since two of his wives were incredibly physically abusive.
But there was one thing that Allen could find happiness in – acting. Under the stage name, Kelsey Grammer, he became immortalised as the character, Dr. Frasier Crane, in Cheers and Frasier. The show, Frasier, won 37 Emmys; more than any other show in history.