World of HYDE
Discovering our Ancestors and their descendants to all parts of the world. Last updated 15th March 2026.
Family: 6th Earl of Mar Domhnall Mac Uillem, 6th Earl Of Mar / Elen Ferch Llywelyn (F6803)
m. Aft 1266
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 | Uilleamn De Mar, 6th Earl Of Mar (1222-1281)
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 | Elisabeth Comyn (1223-1267)
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| Margaret MacGilronan (1248-1337)  |
| Princess Joan Lackland Plantagenet (1188-1237)
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| Gwladus Ferch Llywellyn (1206-1251) |
| Princess of Gwynedd, Princess of Wales, Countess of Huntingdon and Chester, Elen Ferch Llywelyn (1207-1253) |
| Margred Verch Llywelyn Of Caernarfonshire (1208-1267) |
| Daffyd Ap Llewelyn, Prince Of Gwynedd (1212-1246) |
| Elen Ferch Llywelyn (1230-1295)
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| Marjorie De Mar, Countess Of Lennox (1270-1326) |
| Gartnait MacDomhnaill, 7th Earl Of Mar (1272-1305) |
| Duncan De Mar (1274- ) |
| Alexander De Mar (1276- ) |
| Queen Isabel De Mar, Of Scotland (1277-1296) |
| Mary De Mar (1289- ) |