Harry D Sutherland, age 38, born in Iowa
wife: Lillian Sutherland, age 22, born in Oklahoma
daughter: Margaret L Sutherland, age 1, born in Montana
son: Walter G Sutherland, age 6/12, born in Montana
Note that while the 1930 and 1940 censuses say Lillian was born in Oklahoma, they are clearly for the same family as the Lillian Holmes and Harry D Sutherland whose son Walter was born in 1929 in Montana. Walter's birth record says Lillian was born in Redland, California.