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Dictionary of Medieval Names
from European Sources

Blanch m. Latin *blancus, Old English, Old French blanc, Old High German blanch, Middle High German blanc 'white, pale'.

The masculine form was always less common than the feminine form, Blanche.

France
Middle French
1392 Blanchet MemBret-II col. 610; 1438 Blanchet favier 29
Italy
Latin
1265x1339 Blanci (gen) BBC-Berg 32; 1285 Blanci (gen) Perugia1285 p. 153
Spain
Catalan
1510 Blanch valencia1510 4782
Wales
Welsh
1582 Blanch RegCon1 p. 36
Cite as: J. Uckelman, S.L. Uckelman. "Blanch". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 3. http://dmnes.org/2016/3/name/Blanch.