The name Teresa is a girl's name of Spanish, Italian, Portuguese origin meaning "to harvest". Teresa is ranked #720 on our popularity charts and discussed in our forums with posts like "Opposite twins".
From the experts:
Teresa, the simpler phonetic form of this name, was the most popular variation for its early life, when it was used exclusively in Spain and Portugal. Teresa and all its variations are far off their mid-20th-century peak now, though the name has many worthy namesakes including Saint Teresa and Mother Teresa. Short forms Tess and Tessa are now more fashionable. Other spellings to check out: Theresa, the usual English form, and the French Therese.