1. Robert, Lord CLIFFORD has few details recorded about him.
Robert, Lord CLIFFORD had the following children:
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2. Idonia de CLIFFORD (also known as Idoine CLIFFORD and Idonia), daughter of Robert, Lord CLIFFORD and Maud de Clare, was born circa 1300. She died on 24 August 1365. She married Henry, 2nd Lord Percy of Alnwick.
Henry, 2nd Lord Percy of Alnwick, son of Henry, 1st Lord Percy of Alnwick (1273-1314) and Baroness Eleanor FITZALAN ( -1328), was born on [Julian] 6 February 1300 in Leconfield, Yorkshire. He and Idonia de CLIFFORD had the following children:
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3. Henry, 3rd Lord Percy of Alnwick, son of Henry, 2nd Lord Percy of Alnwick and Idonia de CLIFFORD, married Mary PLANTAGENET.
Lady Mary PLANTAGENET was the daughter of Henry PLANTAGENET (1281-1345) and Maud CHAWORTH ( - ). She and Henry, 3rd Lord Percy of Alnwick had the following children:
| 5 | Henry PERCY (1341-1408). Henry was born on 10 November 1341. He had the title '1st Earl of Northumberland'. He was killed at the Battle of Branham Moor. |
4. Maud PERCY, daughter of Henry, 2nd Lord Percy of Alnwick and Idonia de CLIFFORD, married Ralph, Lord Nevill of Raby.
Ralph, Lord Nevill of Raby and Maud PERCY had the following children:
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