Conrad (25 March 1252 – 29 October 1268), called the Younger or the Boy, but usually known by the diminutive Conradin (, ), was the Duke of Swabia (1254–1268, as Conrad IV), King of Jerusalem (1254–1268, as Conrad III), and King of Sicily (1254–1258, de jure until 1268, as Conrad II).
Conrad (25 March 1252 – 29 October 1268), called the Younger or the Boy, but usually known by the diminutive Conradin (, ), was the Duke of Swabia (1254–1268, as Conrad IV), King of Jerusalem (1254–1268, as Conrad III), and King of Sicily (1254–1258, de jure until 1268, as Conrad II).