Infanta doña BERENGUELA de Castilla y León (1204-Constantinople 12 Apr 1237, bur Constantinople). The Chronicon Mundi of Lucas Tudensis names "Alionoram primogenitam, Constanciam, et Berengariam" as the daughters of Alfonso IX King of León and his second wife[747]. The Chronicle of Alberic de Trois-Fontaines refers to the wife of "rex Ierusalem Iohannes" as daughter of "Berengaria" and "regi Legionensi id est regi Galicie" and in a later passage records the marriage of "rex Iohannes Ierosolimitanus" and "filia regis Gallicie, sororem Fernandi de Castella", but in neither place is she named[748]. The Chronique de Guillaume de Nangis records the marriage in 1223 of "le roi de Castille…sa sœur Bérengère, nièce de Blanche reine de France" and "Jean roi de Jérusalem"[749]. The necrology of Maubuisson records the death "II Id Apr" of "Berengaria imperatrix Constantinopolitane"[750]. "Jehan fiuz le roy Jehan de Jherusalem, bouteillier de France" instituted masses for "nostre pere le roy Jehan de Jherusalem et empereur de Costantinoble…et madame Berangiere sa fame jadis nostre mere" in the church of St Paul, Paris by charter dated Oct 1294[751]. m (Toledo 1224) as his third wife, JEAN de Brienne King of Jerusalem, son of ERARD II Comte de Brienne & Agnès de Nevers ([1170]-Constantinople 23 Mar 1237, bur Constantinople). Elected Emperor of Constantinople 1231.