Margery Byset | |
|---|---|
| Born | 14th century Glens of Antrim |
| Died | 15th century Islay |
| Family | Bissett MacDonnell |
| Father | Mac Eoin Bissett |
| Mother | Sabia O'Neill |
Margery Byset (Bisset, Bissett; also Marjery, Margaret, Marie) was an Irish noblewoman belonging to the Bissett family whose marriage to John Mór Tanister MacDonnell in 1399 laid the basis for the Clan Donald claim to the Glens of Antrim, the lordship of which her family had established in the 13th century. She is the ancestress of the Clan MacDonald of Dunnyveg.