Obizzo III d'Este was the marquess of Ferrara from 1317 until his death.

He was the son of Aldobrandino II d'Este

Aldobrandino II d'Este

Aldobrandino II d'Este was the marquess of Ferrara from 1308 until his death.He was the son of Obizzo II d'Este and Jacopina Fieschi, the niece of Pope Adrian V. Aldobrandino became lord of Ferrara at the death of his elder brother Azzo VIII, and renounced to the rights to Modena and Reggio....

 and Alda Rangoni.

Aldobrandino was lord of Ferrara together with his brother Rinaldo and Niccolò, and his cousin Folco II, but in the end reigned as sole ruler. He managed to enlarge the family possessions with the conquests of Modena

Modena

Modena is a city and comune on the south side of the Po Valley, in the Province of Modena in the Emilia-Romagna region of Italy....

 (1336) and Parma

Parma

Parma is a city in the Italian region of Emilia-Romagna famous for its ham, its cheese, its architecture and the fine countryside around it. This is the home of the University of Parma, one of the oldest universities in the world....

 (1344–1346).

He married first in 1317 Jacopa Pepoli

Pepoli

The family of Pepoli were lords of Bologna who took power in the chaotic commune riven by the struggles between Guelfs and Ghibellines and ruled during the first half of the 14th century. Their seat in the city was Palazzo Pepoli Antico, constructed by Taddeo...

 and then in 1347 Lippa Ariosti. Obizzo died in 1352, being succeeded by his son Aldobrandino

Aldobrandino III d'Este

Aldobrandino III d'Este was the Lord of Ferrara and Modena from 1352 until his death, in 1361.He was the son of Obizzo III d'Este and Lippa Ariosti....

.