Martin Hofkamp85 was born 29 Mar 189785, and died Sep 1968 in Sioux Falls, Minnehaha, South Dakota, United States of America85.He married Mabel Louise Leuning, daughter of Hinrich Leuning and Etta Rave. More About Martin Hofkamp: Social Security Number: 503-01-7938.85 SSN issued: South Dakota.85