Philip Joseph Thiem Sr was born in 1830 in Bavaria and arrived in the US in 1842. If you look at the 1850 Census that you cited, he was 20 years old and lived in the home of Emanual Schloss and many other unrelated Germans. I have traced back to Philip Joseph Thiem and I have been unable to find any other information about his parents or port of entry. I read in his eulogy that he came over with his uncle and lived in Baltimore until 1859 and then moved to Raleigh, NC where he married and had children.