Alonso de Fonseca
Alonso de Fonseca is the name of the following people:
- Alonso de Fonseca I (1418–1473), Spanish clergyman, Bishop of Ávila
- Alonso de Fonseca II (1422–1505), Spanish clergyman, bishop of Ávila
- Alonso de Fonseca III. (1475–1534), Spanish clergyman, Archbishop of Compostela
