Mary de Monthermer | |
|---|---|
| Countess of Fife | |
| Born | October 1297 |
| Died | 1371 |
| Spouse(s) | Duncan IV, Earl of Fife |
| Issue | Isabella, Countess of Fife |
| Father | Ralph de Monthermer, 1st Baron Monthermer |
| Mother | Joan of Acre |
Mary MacDuff, Countess of Fife (née de Monthermer; October 1297 – c. 1371) was an English noblewoman. She was a daughter of Ralph de Monthermer, 1st Baron Monthermer and his wife Joan of Acre. Other sources have her being born in 1298.[1]