I'm also related to that family.
Philip Lowey & Joney or Judith Clucas had 3 children: William, Chr. 10 Jan 1732 in Rushen, Henry, Chr. 2 dec. 1735 in Rushen, & Eleanor, Chr. 12 Apr 1752. No, I have no explanation for the gap in having children for them.
Philip Lowey was Born abt 1706. His Father was Henry Lowey, Born abt. 1675, Died 16 Nov. 1736 in Rushen. Henry's wife was Catherine, Bur. 3 Dec. 1752 in Rushen. I can't find her maiden name.
Henry Lowey's father seems to be John Lowey, Born abt. 1649, died 28 Nov. 1708 in Rushen. John's wife I am having trouble in finding. Liber Vast also helped in some of this.