Margaret married 7th Baron Mortimer, 1st Lord Mortimer, Lord of Wigmore Edmund De Mortimer, I about 1285 in Fiennes, Bolonois, France. Edmund (son of ROGER De MORTIMER and MAUD De BRAOSE) was born in 1252 in Wigmore, Herefordshire, England; was christened in 1304; died on 17 Jul 1304 in Wigmore, Herefordshire, England; was buried in 1304 in Wigmore, Herefordshire, England. [Group Sheet] [Family Chart]

1. ISWOLDE ISEUDE De MORTIMER was born about 1270 in Wigmore, Herefordshire, England; died in 1328.
2. Matilda De Mortimer was born about 1286 in Wigmore, Herefordshire, England; died on 18 Sep 1312 in Alton, Staffordshire, England; was buried on 9 Oct 1312 in Croxden Abbey, Staffordshire, England.
3. 1st Earl of March Roger De Mortimer, I was born on 03 May 1287 in Netherwood, Thornbury, Herefordshire, England; died on 29 Nov 1330 in Elms, Tyburn, Warwickshire, England; was buried in 1330 in Shrewsbury, Shropshire, England.
4. Alianor Mortimer was born about 1289.
5. Hugh De Mortimer was born about 1290 in Wigmore, Herefordshire, England.
6. Joan De Mortimer was born about 1292 in Wigmore, Herefordshire, England.
7. Walter De Mortimer was born about 1294 in Wigmore, Herefordshire, England.
8. Margaret Mortimer was born about 1296 in Wigmore, Herefordshire, England.
9. Edmund De Mortimer was born about 1298 in Wigmore, Herefordshire, England.
10. John De Mortimer was born in 1300 in Wigmore, Herefordshire, England; died on 03 Jan 1318.
11. Elizabeth Mortimer was born about 1302 in Wigmore, Herefordshire, England.