King of Castile Pedro (The Cruel) Castille I
Pedro, known as The Cruel, was born about 1310.

 Maria Juana *Padilla
Maria Juana was born in Seville,Sevilla,Spain.¹ 

 Princess of Castile and Leon, Duchess of Lancaster Constanza Perez
Constanza was born in 1354 in Castrojeriz,Burgos,Spain.¹   She died in Liecester Castle,Liecester,Liecestershire,England.  She was buried in 1394 in St Mary's,Liecester,Liecestershire,England.^1 1 

 Isabella *Castille
Isabella was born in 1355.