Philip Prospero, Prince of Asturias was the first son of Philip IV of Spain and Mariana of Austria to survive infancy. Wikipedia
Born: November 28, 1657, Royal Alcazar of Madrid, Madrid, Spain
Died: November 1, 1661 (age 3 years), Madrid, Spain
Great-grandparents: Philip III of Spain, Philip II of Spain, Margaret of Austria, Queen of Spain, and more
Grandparents: Philip III of Spain, Maria Anna of Spain, Margaret of Austria, Queen of Spain, and more
Parents: Philip IV of Spain and Mariana of Austria
Siblings: Charles II of Spain
Cousins