One of my g-g-g-g-grandads was called Joz Gerder. His boy was originally called Johann Henrich Gerder. I am obviously an immigrant!
Joz rocked up to the UK from Germany and married someone - records unavailable for birth and death dates, let alone anything else. John Henry (as he became) has dates: ca 1819-1851 (possibly 32 years old). It is thought that he died from "lacerated wounds" after punching a window and injuring his hand during a drunken brawl.
I can go back 14 generations on some branches (thickets really, not a tree!) of the family. I'm not only a German immigrant but also Cornish, Devonian, Cumbrian, various flavours of Scottish and obviously Irish (both Northern and the Republic).
Anyway, that should give you a clue as to my real name!