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

I found two marriage records from Rock Island Co. Ill for
George Ohlweiler and Lena Hannse, Jul 16, 1895
George Ohlweiler and Mary Gilday apr 24, 1886

This is all for now
Laurae

I believe this is the right George son of Valenin.

I could not find George in the 1880 census.

1900 census Rock Island twp., Rock Island Co., Ill
George Ohlweiler, age 44, born Dec 1855, born Ill, parent Germany
Mary,age 34, born Dec 1865, Ill, parents born Ill
Lilie, age 13, born Dec 1887, , born Ill
Arthur,11, Ill, (Arthur George born march 30, 1889) Ill

1910 Census Rock Island
George Ohlweiler, 56, Ill, Bar tender Hotel
Mary, 44, Ill, parents Irish
Lillian, 23, Ill
Arthur, 21, Ill

1920 census Rock Island
George O Ohlweiler, 69, Ill
Mary, 53, Ill
William Lyons, 35, Ill, parents Ireland
Lillain M, 30, Il
Bettie M, 11/12, Il

1930 census Rock Island
George Ohlweiler, Ill, parents Germany
Mary, 64, Ill, father Irish free state, mother canada
W Henry Lyons, 50, Ill, son in law
Lillian, 42, Ill
Betty M, 11, Ill
Harry F carroll, age 43, born Ill, parents Canada, Brother in law

Laurae

Thank you so much for all of the information you have given me!