Wer heiratete Enrique Pérez de Guzmán, 2nd Count of Niebla?

Enrique Pérez de Guzmán y de Castilla, 2nd Count of Niebla (in full, Spanish: Enrique Pérez de Guzmán y de Castilla, segundo conde de Niebla, señor de Sanlúcar de Barrameda) (20 February 1391 – 31 August 1436) was a Spanish nobleman and military figure of the Reconquista. He drowned while attempting the Seventh Siege of Gibraltar.

Yolande of Aragon or Violante of Sicily (Kingdom of Sicily – 1428, Italian: Jolanda d'Aragona, Catalan: Violant d'Aragó, Spanish: Violante de Aragón) was the legitimized daughter of King Martin I of Sicily and countess of Niebla. She was a member of the House of Barcelona. Eugénie de Montijo, the last Empress consort of the French, was descended from her.