There is some question as to his surname.
An obit in Ref 393 says a six year old son, Michael, of theirs died Jan 10, 1969, when fireplace bricks in their new home fell on him.
Do not know birth order of nine (6 sons/3daughters) of the eleven siblings, nor the names of five of them (3sons/2daughters). Since this comment, we are aware of another son, Robert.
As a possible connection, Ref 401 lists the marriage Nov 12, 1932 of Edna Lentz daughter of Robert, to Harry Bertram son of Edmund.
I originally had his birth place as Charles Bluff, Michigan. In Ref 310, Dorothy writes, "I think that should be Charley Bluff, Rock County, Wisconsin. I don't think there is such a town, but there is an area known to locals by that name."
There is some question as to if her name was Anita.
His birth date and the marriage date of his parents are from obituaries, and therefore might not be accurate, so says Dorothy in Ref 310. Note birth date is before parent's marriage date.
Birth order not know, between Roger and Melvin.
See notes and sources for his wife Marie Gerhardt.
Jefferson Co, WI 18-596 births MARIE GERHARDT Marie says she is born at Fort Atkinson, which is their post office. Jefferson Co, WI 17-231 marriages GERHARDT-BOCKMANN. RESIDENCE- 1993 living in Jefferson, Wis (info by BKlein)
She lived on farm by Ft. Atkinson, Wisconsin in 1992. My records show her husband's name as BROCKMAN.
See notes and sources for his wife Anna Frodel.
Birth order of siblings not known. Lived at Rt. 2, Columbus, Wisconsin in 1967.