Well, they are almost unknown historical figures, but here you are a brief info about their lives.
The marriage of infante Sebastian Gabriel, widow of his first wife Maria Amalia, to infanta Cristina, younger sister of king Francisco de Asis, was an arranged one. It was not easy to find a suitable husband for Cristina, who was called "la infanta boba" because she had not a clever mind and, to add more, was very ugly. The marriage with Cristina, thirty years younger than himself, did give to Sebastian a good position into the spanish royal circle.
Their firstborn, Francisco, was protected by his cousin king Alfonso XII. The king did send the boy to the Theresianum of Vienna. Francisco was the spitting image of his mother: not handsome and, specially, not a clever man. Alfonso took the chance to arrange his marriage to a noblewoman, María del Pilar de Muguiro y Beruete. She was daughter of a count and also a wealthy heiress. It seems that, after the wedding, Pilar started a relationship with the russian Basil Zaharoff. The three daughters of Pilar were probably fathered by Basil Zaharoff, not by Francisco, who has been created duke of Marchena by the king.
Pedro de Alcántara, second son of Sebastian and Cristina, also studied at the Theresianum. It seems that he tried to find an european princess to courtship her, but unsuccesfully. So, the young man, created duke of Dúrcal by his cousin, married María de la Caridad Madan y Uriondo, sister of the marquis of Arucas. Maria de la Caridad was another wealthy heiress. And the marriage was another unhappy marriage. Pedro was dead too young: he was just thirty years old when he died. Maria de la Cariedad remarried soon.
Luis de Jesús, third son of Sebastian and Cristina, was created duke of Ansola by the queen regent María Cristina. Luís was married to a grand daughter of the dukes of Riansares, Fernando Muñoz and María Cristina; so, the wife of Luís was a daugher of a niece of queen Isabel II. The lady was named Ana Germana Bernaldo de Quirós y Muñoz, but she had a nickname: Poulot. Poulot was not a faithful wife: after the wedding, she commited adultery with Manuel Méndez de Vigo, probably the real father of her second son acknowledged by Luís. Luís was dead young, the same history of his brother Pedro de Alcántara duke of Dúrcal.
The other children, Alfonso and Gabriel, were less known that their elder brothers. Alfonso refused to became a duke and he lived a quiet life far from the court. He was still alive during the Second Republic. The younger, Gabriel, was deaf-mute and he died very young.
Hope this brief info helps...
