Stella De' Tolomei 
‌Stella De' and Niccolo III D' were married in a religious ceremony in Relationship. They had three sons and a daughter, named Ugo D', Leonello D', Borso D' and Margherita D'.
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Children
Ugo D' Este
Ugo D' was born on November 17th, 1405. He died due to execution for adultry with Niccolo's first wife Parisina Malatesta. at the age of 19 on May 21st, 1425 in Ferrara, Italy.
Leonello D' Este
Leonello D' was born on September 21st, 1407. He died at the age of 43 on October 1st, 1450 in Palazzo di Belriguardo.
Borso D' Este
Borso D' was born on August 24th, 1413. He died at the age of 57 on August 20th, 1471.