Dictionary of Medieval Names
from European Sources

Theresa f. Of uncertain origin, but possibly from Greek θερίζω 'to harvest'.

The name of a 12th-13th C Portuguese saint and queen of Leon, and a 16th C Spanish saint.

The name did not spread outside of the Iberian peninsula until the 16th century, with the veneration of Saint Theresa of Avila.

1096 Taraxea (abl) PHGCRP-I no. 1, Taraxia (nom) ibid. no. 1; 1121 Tarasia (abl) ibid. no. 2, Tharasia (abl) ibid. no. 2; 1179x1211 Tarasiae (gen) ibid. no. 5; 1189 Therasia (abl) ibid. no. 9; 1190 Tharasia (nom) ibid. no. 8; 1209 Tarasie (gen) ibid. no. 10, Tarasiæ (dat) ibid. no. 10, Taresia (nom) ibid. no. 10, Tharasiæ (dat) ibid. no. 10; 1269 Tarasia (nom) ibid. no. 11, Tarasie (dat) ibid. no. 11, Tarasiæ (gen) ibid. no. 11
1510 Tareza valencia1510 4303, Teresa ibid. 4162
1319 Tareisa deMoxo, Teresa ibid.; 1328 Tereysa ibid.; 1332 Tereysa ibid.; 1334 Teresa ibid.; 1336 Tereysa ibid.; 1348 Tereysa ibid.; 1496 Theresa olite1496 p. 185; 1575 Teresa Catalogo-5.2 3816; 1576 Teresa ibid. 3989
Cite as: S.L. Uckelman. "Theresa". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2018, no. 1. http://dmnes.org/2018/1/name/Theresa.