The queen of Castile, Joanna of Castile, married this member of the house of Habsburg who was the son of which monarch?
Philip I of Castile Philip I (22 July 1478 – 25 September 1506) called the Handsome or the Fair, was the first member of the house of Habsburg to be King of Castile. The son of Holy Roman Emperor Maximilian I, at the age of three Philip inherited the greater part of the Duchy of Burgundy and the Burgundian Netherlands (as Philip IV) from his mother, Mary, and at 27 briefly succeeded to the Crown of Castile as the husband of Queen Joanna, who was also heir presumptive to the Crown of Aragon. He was the first Habsburg monarch in Spain. He never inherited his father's territories or became Holy Roman Emperor because he predeceased his father, but his son Emperor Charles V eventually united the Habsburg, Burgundian, Castilian, and Aragonese inheritances.
Archduke Joseph, Palatine of Hungary Joseph Anton Johann, Archduke of Austria (German: "Erzherzog Joseph Anton Johann Baptist von Österreich-Toscana, a.k.a. Joseph Anton Johann von Österreich" , Hungarian: "Habsburg-Toscanai József Antal János főherceg, a.k.a. József nádor" , Czech: "Josef Habsbursko-Lotrinský" , 9 March 1776, Florence – 13 January 1847, Buda), was the Palatine of Hungary from 1796 to 1847. He was the seventh son of Leopold II, Holy Roman Emperor and Maria Luisa of Spain.