Welcome to Rootschat.
Cant see that they had a Son James.
Looked everywhere but the Peerage has a list of children you may have already found;
Lady Charlotte North3 d. 25 Oct 1849
Lady Anne North+4 d. 18 Jan 1832
George Augustus North, 3rd Earl of Guilford+1 b. 11 Sep 1757, d. 20 Apr 1802
Lady Catherine Anne North3 b. 16 Feb 1760, d. 6 Feb 1817
Lt.-Col. Francis North, 4th Earl of Guilford3 b. 25 Dec 1761, d. 11 Jan 1817
Frederick North, 5th Earl of Guilford3 b. 7 Feb 1766, d. 14 Oct 1827
What dates do you have for James and when/where did he Marry?
Trish
