I am not related, but I run Valentine Ohlweiler name though ancsetry.com search and this is what I found.

US Passport application
March 30, 1858
Valentine Ohlweiler, age 37 years, 5 fet, 5 inches high, Light completion, light hair, light hazel eyes, small stright nose, large mouth, broad forehead,

Valeninte Ohlweiler born Aug 15, 1822 in Ducdam of Hessen Darmstadt from US passport application Apr 9, 1867

1860 Census Rock Island twp. Rock Island Co. Illinois
Valentin Olwiler, age 42, born Hesse-Darmstadt
Mary Claude, age 38, born Hesse
Charles, age 13, born Hesse
Mary, age 12, born Hess
George, age 8, born Ill
Kate, 4, Ill
Lewis, 2, Ill

living by
Jacob Olwiler, 30, Hesse
Claude, 30, Hesse
Jacob, 4, Ill
John, 2, Ill

1870 Census Rock Island twp. Rock Island Co., Ill
Faldine Olwiler, age 51, born Hesse, retail liquer dealer
Mary, 48, Hesse
George, 19, Ill
Katie, 16, Ill
Louis, 12, Ill
John, 10, Ill
Mena, 5, Ill, female

1880 census Rock Island twp, Rock Island Co., Ill.
Valentine Ohlwiler, age 63, born Hesse, both parents born Hesse
Mary, age 53, born KY, both parents born KY

Charles Ohlweiler, age 33, Hesse
Eliza, 29,
Annie, 11, Ill
Emma 9, Ill
Mary, 5, Ill

Jacob Ohlweiler, 55, Hesse
Susan, 51, Hesse
Jacob, 24, Ill
George, 19, Ill
Mary, 15, Ill
Caroline, Ill
Amelia, 10, Ill
Louis, age 23, Ill, Nephew

This is all I found so far. I can seem to find George after 1870 any where in the United States.
Laurae