Infante Juan, Count of Barcelona

Infante Juan of Spain, Count of Barcelona , was the third surviving son and designated heir of King Alfonso XIII of Spain and Victoria Eugenie of Battenberg. His father was replaced by the Second Spanish Republic, and under his son, Juan Carlos I, a constitutional monarchy was restored. As king of Spain, he would have been Juan III.

Juan was born at the Palace of San Ildefonso. His father was forced into exile when the Second Spanish Republic was proclaimed onApril 1931. Owing to the renunciations of his brothers Alfonso of Spain, Prince of Asturias, and Infante Jaime, Duke of Segovia, Infante Juan was thus next in line to the defunct Spanish throne. He thus received the title Prince of Asturias when he was serving with the Royal Navy in Bombay.

Source: Wikipedia