Dictionary of Medieval Names
from European Sources

Franka f. Latin Franca, Old High German Franko, French Franc 'a Frank, a French person'.

France
Latin
c1050 Franca (nom) StVdM-II 672; c1060 Franca (nom) ibid. 662
Italy
Latin
1265x1339 Francha (nom) BBC-Berg 160
Cite as: S.L. Uckelman. "Franka". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Franka.