Dictionary of Medieval Names
from European Sources

Firmin m. Latin Firminus, a diminutive of Latin firmus 'firm, strong'.

The name of a 3rd C saint.

Fremin is a Norman and Picard form. For more information, see Morlet, s.n. Fremin.

England
Latin
1189 Feremannus (nom) GASurv p. 234
France
Latin
1163 Firmino (abl) clairvaux-12thc 104; 1301 Firmini (gen) MemPic-vol17 p. 178, Firmino (abl) ibid. p. 245, Firminus (nom) ibid. p. 176; 1378 Firmino (dat) hanquetvol1 811
Old French
1301 Fermin (obl) MemPic-vol17 p. 234, Fermins (nom) ibid. p. 234, Fremin ibid. p. 232, Fremins (nom) ibid. p. 234; 1313 Fremin Paris1313 p. 50
Middle French
1388 Fremin thierry; 1392 Fremin MemBret-II col. 599; 1421 Fremin favier 579; 1564 Fremin RegPCC-1 p. 44; 1567 Fremin ibid. p. 299; 1568 Fremin ibid. p. 367; 1571 Fremin ibid. p. 461
Cite as: J. Uckelman, S.L. Uckelman. "Firmin". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Firmin.