Dictionary of Medieval Names
from European Sources

Blanchefleur f. Old French blanc 'white, pale', from Old High German blanch, Middle High German blanc + Latin Flora, the name of the goddess of flowers, derived from Latin flos 'flower'.

Italy
Latin
1514 Blancha fior (nom) Rossi-StudiStoria p. 274
Cite as: J. Uckelman, S.L. Uckelman. "Blanchefleur". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Blanchefleur.