infante

n. son of a Spanish or Portuguese king who is not heir to the throne (particularly the second son)

In the Spanish and former Portuguese monarchies, Infante (masculine) or Infanta (feminine), also anglicized as infant, is the title given to a son or daughter of the reigning King who is not the heir-apparent to the throne. Other, more distantly related, princes of the blood of the Spanish and Portuguese royal families are also granted the title. Note that infante is also used for a hereditary title of nobility, as in los infantes de Carrión in The Lay of the Cid.
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n. infanta, infante

n. infant, baby

n. infant, baby