Henry III of Castile
Henry III , sometimes known as Henry the Sufferer or Henry the Sick , was the son of John I and Eleanor of Aragon. He succeeded his father as King of Castile in 1390.
Henry was born in Burgos, the capital of Castile. He was the firstborn child of the recently crowned king John I of Castile and his wife Eleanor of Aragon. His younger brother Ferdinand grew up to become king of Aragon.
Source: Wikipedia