Yes, it is a boy! When boys were boys...hmmm

Louis Philippe Joseph, Herzog von Montpensier, 1750

National Trust

Charles II Prince of Wales, 1630

National Portrait Gallery, London

Louis XV of France, 1712

Baltasar Carlos, Prince of Asturias,

son of Philip IV of Spain, 1600s

by Diego Velázquez

Ulrik, Prince of Denmark (1611-1633), son of Christian IV

by Jacob van Doort, ca. 1615

found here