Fascinating Gaelic Gravestone Inscription

[Calgacus]

Monzie is translated elsewhere as being from Moighidh but in the inscription it is spelt Maidhgheadh, perhaps a local variation or an attempt to spell the Gaelic pronunciation, and is presumably from the root ‘magh’, a field or level plane and ‘Eadh’, the meaning of which I can’t fit with 'magh'. Watson, in his Celtic Place-names of Scotland got Magh-iodh and Magh-eadh from Gaelic speakers. He also collected Magh Bhàrd for Monzievaird. If one follows Watson's alternative spelling of iodh then we have 'corn' or more generally 'food' so perhaps the original meaning was something like the field or plane of corn.

That makes much more sense, as the land around Monzie is better described as 'field of corn' than 'bog land'.