Editing Peter of Castile (section)

==Children==
Peter's children by [[María de Padilla]] were:
* Beatrice (1353–1369),{{sfn|Bartlett|2020|p=161}} nun at the Abbey of Santa Clara at Tordesillas<ref>{{cite web | url=https://dbe.rah.es/biografias/60073/beatriz-de-castilla | title=Beatriz de Castilla &#124; Real Academia de la Historia }}</ref>
* [[Constance of Castile, Duchess of Lancaster|Constance]] (1354–1394), married [[John of Gaunt]], 1st [[Duke of Lancaster]]<ref>{{harvc|last=MacKay |first=Angus |c=Catalina de Lancaster |in1=Gerli |in2=Armistead |year=2003 |p=215}}</ref>
* [[Isabella of Castile, Duchess of York|Isabella]] (1355–1392), married [[Edmund of Langley, 1st Duke of York]]{{sfn|Leese|2007|p=149}}
* Alfonso (1359–1362). Peter forced the Cortes to recognize Alfonso as his legitimate heir on 29 April 1362. However, Alfonso, a very sickly child, died at the age of three, months after his recognition as Crown Prince.

Peter had one son with [[Juana de Castro]]:
* John (1355–1405), married doña Elvira de Eril, had issue.<ref>[http://genealogy.euweb.cz/ivrea/ivrea8.html#PO House of Ivrea-Castile]</ref>

With María de Henestrosa, cousin of María de Padilla:
* Fernando de Castilla (1361-1362)<ref name="::">{{Cite web|url=https://www.academia.edu/2127419|title=Don Sancho de Castilla (1363-1371): Apuntes biográficos de un hijo ilegítimo de Pedro I.|last=Cañas Gálvez|first=Francisco de Paula|year=2012|page=1126 and n. 1|language=es}}</ref>

With Isabel de Sandoval, ''aya'' of his son Alfonso:
* Sancho de Castilla (1363–1371)
* Diego de Castilla (1365–1440), whose grandson Pedro de Castilla y Fonseca "el mozo" was lover to the queen [[Joan of Portugal]].

With Teresa de Ayala, niece of [[Pero López de Ayala]]:
* María de Castilla, who with her mother had long careers at the [[Dominican convent]] of Santo Domingo el Real in [[Toledo, Spain|Toledo]] and maintained a friendly correspondence with the Trastámaras.{{sfn |Estow |1995 |pages=xvi, n. 5}}