This is Tom's brother Fred Wolfe, born in 1894. He is portrayed as the gregarious Luke Gant of Look Homeward, Angel and Of Time and the River.

"...he came with wide grin, exuberant vitality, wagging and witty tongue, hurling all his bursting energy into an insane extraversion. He lived absolutely in event: there was in him no secret place, nothing withheld and guarded--he had an instinctive horror of all loneliness.
....he built up an image of himself as the Good Fellow, witty, unselfish, laughed at but liked by all---as Big-Hearted Unselfish Luke. And this was the opinion people had of him."