I have about 20 Henry Brahms in my data base. If your Henry Brahm arrived in 1842 there are only 4 or 5 that could be your Henry. Of these the most likely is: Henry Brahm b. 1831 son of Simon Brahm and married to a Anna Maria (??) in 1859.

If you could give me more info on your Henry, perhaps I can pin point him for you.