See also
1. Agnes de Percy, daughter of William de PERCY ( - ) and Alice de Tonbridge ( - ), was born in 1134. She died in 1204. She married Josceline de Louvain of Petworth.
Josceline de Louvain of Petworth was the son of Godfrey Brabatus, Duke of Lothier (1060-1139). He and Agnes de Percy had the following children:
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2. Henry de PERCY, son of Josceline de Louvain of Petworth and Agnes de Percy, was born circa 1145. He died in 1198. He was buried in Abbey St. Lo, Normandy, France. He married Isabel.
Isabel was the daughter of Adam de Brus, Lord of Skelton ( - ). She and Henry de PERCY had the following children:
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3. William de Percy, son of Henry de PERCY and Isabel, was born circa 1193 in Alnwick, Northumberland. He married Eleanor de Baliol circa 1234 in Red Castle, Scotland. He died in 1245. He married Elena.
Eleanor de Baliol, daughter of Lord Ingelram de BALIOL (1175-c. 1244) and Agnes de Berkeley (1170-bef1281), was born circa 1206 in Red Castle. She and William de Percy had the following children:
| 4 | Henry de Percy (c. 1235-1272). Henry was born circa 1235 in Whitby, Yorkshire. He married Eleanor PLANTAGENET on 8 September 1268 in York. He died on 29 August 1272 in Sallay Craven, Yorkshire. |
Elena was the daughter of Lord Ingelram de BALIOL (1175-c. 1244) and Agnes de Berkeley (1170-bef1281). She and William de Percy had the following children:
| 5 | Henry de Percy (c. 1235-1272). Henry was born circa 1235 in Whitby. He married Eleanor PLANTAGENET on 8 September 1268 in York. He died on 29 August 1272 in Sallay Craven. |