Words and Proper Names

fo-

679.
Armstrong (John): Phonological irregularity in compound verb forms in the Würzburg Glosses.
In Ériu 27 (1976), pp. 46–72.
Concerns especially composition with the preverbs ro-, fo-, to-, ind-/en.
3527.
Hamp (Eric P.): Nodiadau amrywiol: [3.] gwaesaf.
In BBCS 40 (1993), p. 119.
Compared to OIr. fóessam.