I found some information on James and Rachel Maxwell who were born in Ireland and immigrated to the U.S. ca. 1822.  They lived in Allegheny as late as 1850.  They had at least 7 children. Their oldest son James A. Maxwell is my gggGrandfather. James A. also had at least 7 children, my connection being through the 4th son Joseph R. Maxwell. Joseph R. also had at least 7 children, his oldest son Samuel J. Maxwell being my gGrandfather. This line all lived in Allegheny, P.A. At some point Samuel J. moved to Arkansas and married and had a bunch of children of which my grandfather, Richard Maxwell is one of the last few remaining.