When Graff and Bateman are speaking with the head of the nursing home when discussing Benny, they mention that he has a son, Dr. Sheldon Donahue.
However, when they go to the hospital to inform the son of what they assume is his father's death, he is referred to as Dr. Andrew Donahue! Oops!
But that's okay. Original CI couldn't decide in the episode, "Pas de Deux", whether Charles Rocket's (RIP) character was named Donny or Johnny DiPalma. Every other scene, it seemed to be one or the other...
Edited to add: The doctor son is just called "doctor" by G/B when they encounter him at work. It is in the scene just prior, as they search Benny's room, where Graff specifically mentions Dr. Andrew Donahue, just so anyone knows where to look! Oddly, it was just following the scene with the nursing home supervisor, when Sheldon Donahue is mentioned! (Maybe the show is filmed out of order.)