My lst generation Ulmer was Georg (correct spelling) born ABT 1661 in Altheim (near Ulm), Wurtenburg, Germany. He died 16 March 1705/06 in Altheim.He married his lst wife Barbara Hornong on 10 August 1684.Barbara was born 17 Feb. 1662/63.His second wife was Anna Bokkelmann.Georg & Anna tied the knot on 6 Dec. 1698. Georg had 2 children by 1st wife and 2 children by 2nd wife. According to the data that I have, three of the four children came across in the "Lydia," in the spring of 1742. One settled in the area of Marblehead, Mass, the other two went on to Broad Bay, a German settlement (now called Waldoboro, Maine).I believe the son that was left behind was Mattheu Ulmer, b. 4 Nov 1699 which I have no data on and likewise on Hans Jacob Ulmer that I believe settle in Marblehead.The Ulmers at Broad Bay, of which I've done an extensive search including their spouses.
I've research your Louis and theirs nothing in my files.However will look to see if I have a PA.,connection. GOOD LUCK!!