My g grandfather is Ernest Ehlers b 1862, came to US in 1893. I have his father - per passport application as a Frederick Ehlers unknown birth date. I know from passenger manifest for His wife Dora/Dorothy/Dorothea (poss Turk) and 4 of their children (Meta, Ernest, Olga (later known as Olive) and Emil) that they were from the Oldesloe, Holstein area of what was then Prussia.
The family settle in St. Louis, Mo.