Loch=a lake; e.g. Loch Reoin, Loch Echtra.

Mag=a plain; e.g. Mag Ai, Mag Murthemne, Mag Breg, Mag Clochair
(cloch=a stone).

Methe, explained as if from meth (death); Methe Togmaill (death of
the Squirrel), Methe n-Eoin (death of the Bird).

Reid, gen. Rede=a plain; e.g. Ath Rede Locha (Ford of Locha's Plain).

Sid=a fairy mound; e.g. Sid Fraich (Fraech's Mound).

Sliab=a mountain; e.g. Sliab Fuait.

I need perhaps hardly say that many of the etymologies given in
Irish sources are pure invention, stories being often made up to
account for the names, the real meaning of which was unknown to the
mediaeval story-teller or scribe.

In conclusion, I have to express my most sincere thanks to
Professor Strachan, whose pupil I am proud to be. I have had the
advantage of his wide knowledge and experience in dealing with many
obscurities in the text, and he has also read the proofs. I am
indebted also to Mr. E. Gwynn, who has collated at Trinity College,
Dublin, a number of passages in the Yellow Book of Lecan, which are
illegible or incorrect in the facsimile; and to Dr. Whitley Stokes
for notes and suggestions on many obscure words.

LLANDAFF, November 1903.