Detroit Haffner family

Looking for branch of Detroit Haffner family.Owned furniture store in early 1900s in Detroit and after a fire moved to California.My grandfather, Otto Haffner (1892 - 1964)was married in 1915.A cousin, Fred Haffner, stood up in his wedding.He was a member of the Haffner family who owned the store and moved to California.I would like to reestablish contact with this side of the family.