Richard Hill

From Memory Alpha, the free Star Trek reference.

Doctor Richard Hill was a physician serving aboard the USS Enterprise-D in early 2367. After Doctor Beverly Crusher became trapped in a warp bubble, her thoughts created an entirely separate universe where people and objects began to disappear. In this alternate universe, Crusher tried to call Hill and Selar to sickbay in order to assist in an examination of Miles O'Brien. However, both had disappeared and their families and colleagues had no recollection of them. (TNG: "Remember Me")

A scene cut from TNG: "Remember Me" establishes Hill's first name was Richard and that he was Crusher's staff osteopath. He came onboard six months prior to the episode with his wife, Cara, who was an exobiologist.