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Dictionary of Medieval Names
from European Sources

Louisa f. Fem. of Louis.

Withycombe's earliest example in England is from 1646; but the name was used by women there earlier. It was, however, never common in any culture, certainly not as common as its masculine counterpart.

England
English
1565 Lewes BEmar-vol1 p. 8
France
Middle French
1421 Loyse favier 1270
Italy
Latin
1522x1532 Loysa (nom) DSF p. 51, 18; 1527 Ludovica (nom) Rome1527 p. 83
1522x1532 Loysella (nom) DSF p. 53, 38
Spain
Catalan
1510 Luisa valencia1510 3704
Cite as: J. Uckelman, S.L. Uckelman. "Louisa". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Louisa.