I'm a research volunteer, not related.
I'm sure you saw on the 1880 census Harris Co. Texas
Julius Henning, 24
Lula, 4 b. Tx
brother - Adolph Henning, 16, Wi
sister - Adah Henning, 13, Wi
Went back to 1870 census to look for everyone at home.
1870 Wi, Milwaukee Co and City (indexed as Hensing)
Julius Henning 59, Austria, Carpenter
Sophia, 46, Austria
Julius, 12, Wi
Amelia, 7, Wi
Adolph, 5, Wi
Ida, 2, Wi
Julius is listed as Hennrich, b. Prussia, carpenter
Sophia, b. Prussia
Can't seem to find much more on the Wisconsin end.
Good Luck in your search