Percy was the son of unknown parents. The date and place of his birth have not been found.
He had two marriages/partners. His first wife is not known. They were married, but the date and place have not been found. Their only known child was Joan (?-?).
His second wife was Isabella Ussher, who he married in 1635. The place has not been found. They had no known children.
Note 1
son of Sir Richard Smyth and Mary Boyle