Battista Da Montefeltro 
Battista Da was born in 1384. Battista Da's father was Antonio Da Montefeltro and her mother is Agnesina De' Prefetti Di Vico. Her paternal grandfather was Federico Paolo Da Montefeltro and her paternal grandmother is Teodora Gonzaga. She was an only child. She died at the age of 64 on July 3rd, 1448.General Notes
SOURCES: LDS FHL Ancestal File # (familysearch.org)
"Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, F.L. J P de Palmas <Aurejac et Tournemire; Frankish line; The Complete Peerage>, 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, , A. Brabant <"Dynastie Montmorency, Michel d'Herbigny>, Paul Leportier, Claude Barret>, H.R. Moser <Burke Peerage>, L. Orlandini, O.Guionneau, L.B. de Rouge, E. Polti, N. Danican <Britain's Royal Families; Buthlaw, Succession of Strathclyde, the Armorial 1961-62> 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, P. Ract Madoux <History of Morhange; Leon Maujean; Annuaire de Lorraine, 1926; La Galissonniere: Elections d'Arques et Rouen>), E. Wilkerson-Theaux <Laura Little>, O. Auffray... http://geneastar.org.
They had a daughter named Elisabetta.