Early-attested site in the Parish of Upper and Lower Mitton
- Bourlasshe 1378 IpmR 1379 Pat
- Bourlash 1390 ADiii
The forms are few and late but the second element appears to be æsc. The first may be a pers. name Burgela , a weak form of the name Burgel , itself a diminutive form of Burga . For these pers. names v. Redin 45, 139. Hence 'Burgela's ash-tree.'