1840 Estimated Birthdate:995 Birth date estimated from statement on marriage record that Valentine was over age twenty-one at the time of his marriage to Barbara.

1880 U.S. Census:2473
Montgomery County, Ohio (Dayton)
Enumerated 7 June 1880
Valentine Koch •• white, male, 55, married, laborer, born in Hesse Darmstadt, father born in Hesse Darmstadt, mother born in Hesse Darmstadt
Barbara •• white, female, 37, wife, married, keeping house, born in Ohio, father born in Bavaria, mother born in Hesse Casell
Chas. Ath. •• white, male, 17, son, single, clerk in store, born in Ohio, father born in Hesse Darmstadt, mother born in Ohio
Elizabeth •• white, female, 15, daughter, single, at home, born in Ohio, father born in Hesse Darmstadt, mother born in Ohio
Jno. V. •• white, male, 9, son, single, at school, attended school within the year, born in Ohio, father born in Hesse Darmstadt, mother born in Ohio