Words and Proper Names

berthae

2606.
Corthals (Johan): Mittelirisch berthae.
In ZCP 37 (1979), pp. 203–206.
Expands btho in the Egerton 1782 version of Táin bó Regamna as bertho (= berthae, for OIr. bertae), vs. the emendation bretho by E. Windisch (in IT II, ii, p. 241).