Census Inquiry - Hillman

You will probably be inundated with requests but it was nice of you to volunteer to look up names.

I feel that my ancestor may have changed their given names or at least Americanized them. I believe that Sofia is the only one with the name she was born with. These are my German ancestors:

George Henry Hillman, b. 1824, Hanover
Mary Ann Grossaup, b. 1828, Hanover
George Fredrick Hillman, b. 2-3-1847, Hanover
Caroline Betty Hillman, b. 12-4-1850, Hanover
Sofia Hillman, b. Hanover

They came to America in 1855 taking 6 weeks to cross.