According to 1930 Census:
First name - Rolf
Lived next door to the Shepherd family.
Wife's name - Maurine (Maureen ?)
Son's name Rolf Jr, age 8
Occupation: Machinist, Steam Railroad
 

Note: In the early version of the "Ludlow Kissel and the Dago Bomb" story, Mr Bruner was the character and in Shep's telling of the story, they both worked for the railroad.