benyw

Welsh

Nominalized adjective, perhaps from Proto-Brythonic *banujos,^[1]masculine derived from Proto-Celtic *ban-, whence Welsh banon (“maiden queen”), Old Breton ban-doiuis (“goddess”), Old Irish ban-chú (“female dog”);^[2] akin to Cornish benow (“feminine, female”).^[3] Further related to Old Welsh ben (“woman”), from Proto-Celtic *benā, from Proto-Indo-European *gʷḗn. Doublet of banw.

benyw f (plural benywod)

Welsh mutation
radical	soft	nasal	aspirate
benyw	fenyw	menyw	unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

^ Schrijver, Peter C. H. (1995) Studies in British Celtic historical phonology (Leiden studies in Indo-European; 5), Amsterdam, Atlanta: Rodopi, page 298
^ Ranko Matasović, Etymological Dictionary of Proto-Celtic (Leiden: Brill, 2009), 61.
^ Dagmar S. Wodtko, Britta Irslinger & Carolin Schneider, eds., Nomina im Indogermanischen Lexikon (Heidelberg: Universitätsverlag Winter, 2008), 178, 180n7.