Here are notes from my great aunt:
Martin Daub-my dad's grandfather lived at Rotenburg on Nerkar in Wurtenburg (or Schwalen). He was a soapmaker "seiferseder". Had the business in the lower half of house. He left Germany about 1855 of so after his wife died. His 2 daughters and one son (Nicolas-Louiville, Kentucky; Theresa Christman, Cinncinnatti Ohio; Lenora Phiffer-Newark, NJ.). Martin made several (2-3) trips back and forth (to America) and died enroute of some illness and was buried at sea (dropsy).