n = bréife: bretnas argit co mbrephnib óir inna brut with loops (clasps ?) of gold, LU 1809 (ICM).

As n. loc. f. of a district approx. corr. to mod. Cos. Cavan and Leitrim: a Breithfne, Ériu iv 146 § 24. B. (: ḟéithle), TD 14.20 . B. (: dtéighfe), Aithd. D. 30.8 . in dā Bhréithni, O'R. Poems 527 `Cos. Cavan and Leitrim', p. 302 . tú buachail na B.-si, 129 . an Bhreifne do thabhairt . . . go loisgfeadh an Bh., Carney, Gen. History of the O'Reillys 39.16 , 28 . See Hog. Onom. s. Brebne , Breibne , Breifne and TD 16.13 n.