Hi, I also noticed there is a William Robertson in Montgomery,AL that came from Maer Ireland that is most likely related to your Patrick. His kids are all post 1850 birthed so he looks like he immigrated in around the same time as Patrick. 1860 > ALABAMA > MONTGOMERY > MONTGOMERY P O Series: M653 Roll: 19 Page: 249 Surname GivenName Age Sex Race Birthplace State County Location Year ROBERTSON WILLIAM 36 M W IREL AL MONTGOMERY MONTGOMERY P O 1860 ELLEN 30 IRELAND ANN 5 MARY E. 3 Ernie