| Nickname |
Helen |
| Birth |
Abt. 1206 |
Caernarvonshire, Wales |
| Died |
Bef. 24 Oct 1253 |
Chester, Chestershire, England |
| |
| Father |
Prince of Wales LLYWELYN FAWR Ap LORWETH, b. 1173, Castle Aberffraw, Caernarvonshire, Wales |
| Mother |
Princess of England JOAN PLANTAGENET, b. 1188, London, Middlesex, England |
| Married |
1205 |
England |
| |
| Family 1 |
ROBERT De QUINCY, b. Abt. 1188, Winchester, Buckley, Hampshire, England |
| Children |
| | 1. Anne De Quincy, b. Abt 1238, Blisworth, Northamptonshire, England |
| | 2. Joane Quincy, b. Abt 1240, Blisworth, Northamptonshire, England |
| + | 3. Hawise De Quincy, b. Abt 1242, Blisworth, Northampshire, England |
|
| |
| Family 2 |
The 6th Earl of March DONALD De MAR, b. Abt 1243, Kildrummy, Aberdeenshire, Scotland |
| Married |
Abt 1269 |
Kildrummy, Aberdeenshire, Scotland |
| Children |
| + | 1. MARJORY De MAR, b. Abt 1270, Mar, Aberdeenshire, Scotland |
| | 2. Earl of Mar Gratney, b. Abt 1272, Kildrummy Castle, Kildrummy, Aberdeenshire, Scotland |
| | 3. Duncan of Mar, b. Abt 1274, Kildrummy Castle, Kildrummy, Aberdeenshire, Scotland |
| | 4. Alexander of Mar, b. Abt 1276, Kildrummy Castle, Kildrummy, Aberdeenshire, Scotland |
| + | 5. Isabell of March, b. Abt 1278, Kildrummy Castle, Kildrummy, Aberdeenshire, Scotland |
| | 6. Mary of Mar, b. Abt 1280, Kildrummy Castle, Kildrummy, Aberdeenshire, Scotland |
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| |