| Coat of arms associated to Fonseca | |
| Language | Portuguese |
|---|---|
| Origin | |
| Meaning | dry fount |
| Region of origin | Portugal |
| Other names | |
| Variant forms | Fonseka, Afonseca, Affonseca, de Fonseca, de Afonseca, de Affonseca, D'Afonseca, D'Affonseca |
Fonseca is a surname of Portuguese origin, that can be found in Portuguese-speaking countries, as well as in Spanish-speaking countries and among Sephardic Jews. A feudal lordship name from a place named for a spring that dried up during the summer months, it comes from Latin fons sicca, meaning "dry fount".
Fonseca or Fonseka may refer to: