Calvin Lettenmaier was born near Sanborn, North Dakota, to Theodore and Clara (Johnson) Lettenmaier. He grew to manhood on the family farm and married Ilah Mae Kronebusch, daughter of Mathew and Isabel (Lienhart) Kronebusch. Both families are pioneers in Barnes County.

Seven children were born to Calvin and Ihah Mae: Ted born in 1949; Duane, born in 1950, married Patricia Branenberg; Jerome, born in 1952; David born in 1954; Kent, born in 1956; Maribeth born in 1957 and Leanne, born in 1959.

Kent purchased his grandparents farm and is actively farming and also attending the Wahpeton School of Science.

Calvin Lettenmaier family. Standing: Kent, David, Calvin, Ted, Duane and Jerome. Sealed. Leanne, Ilan Mae, Maribeth and Patricia.

Source: Barnes County History 1976 Page 141