Henry IV of Castile was born on 1425-01-05.
Sancho IV of Castile was born on 1258-05-12.
Ferdinand IV of Castile was born on 1285-12-06.
Infante Henry of Castile was born in 1230.
Henry I of Castile was born on 1204-04-14.
King Ferdinand IV of Castile was born on December 6, 1285.
Henry III of Castile was born on 1379-08-04.
Henry II of Castile was born on 1334-01-13.
King Henry II of Castile was born on January 13, 1334.
King Henry III of Castile was born on October 4, 1379.
King Henry II of Castile was born on January 13, 1334.
King Henry III of Castile was born on October 4, 1379.
There was no king Henry VI of Spain. King Henry IV of Castile, was the brother of Isabella of Castile, of Isabella and Ferdinand fame. Isabella was the mother of Catherine of Aragon, Henry VIII's first wife. So Henry VI of Castile (in Spain) was the uncle of Henry VIII's wife.