Do you have any approximate dates of both (ballpark figure) for the Ruff's you mentioned in your message? I have a copy of the Passenger and Immigration Lists Index 1500-1900 and there are three Andreas Ruff (all 1741, 36 years old) two of them listed 'Place of Arrival' Pennsylvania and one North America. There are two Andreas Ruff (both 1846) North America, no ages listed, one Andrew Ruff Jr. (1896-1910), Kansas, 26 years old, one Andri Ruff (1902), Halifax, N.S., 2 years old. Also, one Franz Ruff (1861), North America, no age listed. Hope this helps.