I have David Carnahan/Carnathan (b. 1830 in PA - d. 13 Feb 1907 Elizabeth Twp., Allegheny Co., PA) married to Mary Jane Mansfield (b. 1830 in PA - d. 14 Mar 1904 in West Newton, Westmoreland Co., PA) who had the children: Alonzo, James, George, Harry, William, Jeanette, Nancy, and Hugh.
David's son Hugh Carnahan/Carnathan (b. 15 Aug 1869 in Saltzburg, PA - d. 8 Nov 1936 in Boston, Allegheny Co., PA) married to Martha Jane King (b. 14 Feb 1875 in PA - d. 22 May 1916 in McKeesport, Allegheny Co., PA) who had the children: Ida Mae, Mary, Clyde, Bessie, Ruth, Margaret, and Frank.
David's granddaughter Ida Mae Carnahan (b. 13 Sep 1892 in Boston, Allegheny Co., PA - d. 4 Jun 1974 in Mt. Washington, Pittsburgh, Allegheny Co., PA) married Andrew Jackson Cupples (b. 23 Jul 1889 in Pittsburgh, Allegheny Co., PA - d. 31 Jan 1965 in Ohio).
I am trying to find the parents of David Carnathan and Mary Jane Mansfield, as well as any of their siblings. The name was spelled both ways (Carnahan, Carnathan) for David and Hugh, but always Carnahan for Ida Mae.