Aldobrandino III d'Este

Aldobrandino III d'Este (14 September 1335 – 3 November 1361) was the eldest son of Obizzo III d'Este and Lippa Ariosti, born before his parents married and legitimized by a bull of Pope Clement VI. In 1352 he succeeded his father as lord of Ferrara and Modena.

In 1355 he was among the first Italian lords to accompany Charles IV on his march to Rome for the imperial coronation, a loyalty that won his state wide privileges. He died on 3 November 1361, leaving a five-year-old son, Obizzo, who did not inherit; power passed instead to his brother Niccolò II.