Niccolo II D' Este 
Niccolo II D' was born on May 17th, 1338. Niccolo II D''s father was Obizzo III D' Este and his mother was Lippa Ariosto. His paternal grandfather was Aldobrandino II D' Este and his paternal grandmother is Alda Rangoni. He had two brothers and two sisters, named Aldobrandino III D', Alberto I D', Lisa D' and Alda D'. He was the second youngest of the five children. He died at the age of 49 on March 26th, 1388.General Notes
SOURCES: LDS FHL Ancestal File # (familysearch.org)
"Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. Jacquier <Genealogy of Lewis Carroll, Justin Swanstrom, The Royal Families of England Scotland & Wales by Burkes Peerage; Debrett's Peerage & Baronage; Table of descendants French Canadian Genealogical Society; Families of Monfort-sur-Risle & Bertrand de Bricquebec; The Dukes of Normandy, XXXXI, Paul Leportier, Claude Barret; Irish Catholic Encyclopedia>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842>, L. Gustavsson, C. Cheneaux, E. Lodge, S. Bontron <Brian Tompsett>, R. Dewkinandan, H. de la Villarmois, C. Donadello; Scevole de Livonniere, H. de la Villarmois, I. Flatmoen, G. Kepklian)... http://geneastar.org.
They had a daughter named Taddea D'.
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Children
Taddea D' Este
Taddea D' was born on July 21st, 1365. She died at the age of 39 on November 23rd, 1404 in Padova.