Ferdinand the Holy Prince of Portugal (died 1443)

Ferdinand the Holy Prince, sometimes called the "Saint Prince" or the "Constant Prince", was an infante of the Kingdom of Portugal. He was the youngest of the "Illustrious Generation" of 15th-century Portuguese princes of the House of Aviz, and served as lay administrator of the Knightly Order of Aviz.

September 29 is the 272nd day of the year in the Gregorian calendar; 93 days remain until the end of the year.