Aldobrandino II d'Este
Aldobrandino II d'Este (c. 1267–1326) was a son of Obizzo II, and in 1289 married Alda Rangoni. When his brother Azzo VIII died in January 1308 he claimed the marquisate, but the succession struggle let papal forces seize Ferrara, and the Este went into exile for nearly nine years, dropping claims to Modena and Reggio.
The ensuing war ended in 1313 with Venice recognizing Ferrara as papal territory. In 1317 Aldobrandino returned with his sons and recovered the lordship of Ferrara, ruling until his death at Bologna on 26 July 1326. His sons succeeded him, sharing the city until Obizzo III made himself sole lord.