He was the son of Francis McClain from Derry, Ireland. His mother was Susan Mulhatton from Lancaster, Pennsylvania. He attended parochial schools in Lancaster, Pennsylvania, and graduated from Lancaster High School Class of 1881.
Born in Derry, Ireland, Francis McClain had a mother named Susan Mulhatton from Lancaster, Pennsylvania. He attended parochial schools in Lancaster, Pennsylvania, and graduated from the Lancaster High School class of 1881.