Katherine de Clifford - 23 Apr 1413 (1369–1413) Parents Maud de Beauchamp Roger de Clifford, 5th Baron de Clifford Children Jane Greystoke Maud Greystoke John Greystoke, 4th Baron Greystoke Siblings Margaret de Clifford Sir William de Clifford unknown daughter de Clifford unknown daughter de Clifford Thomas de Clifford, 6th Baron de Clifford Maud Clifford Philippa de Clifford Lewis Clifford Partners Ralph de Greystoke, 3rd Baron Greystoke