Died in 1455

Feb 18 Fra Angelico an Early Italian Renaissance painter described by Vasari in his Lives of the Most Excellent Painters, Sculptors, and Architects as having "a rare and perfect talent".
Mar 24 Pope Nicholas V Pope from 6 March 1447 until his death in 1455. The Pontificate of Nicholas saw the fall of Constantinople to the Ottoman Turks. He is the last pope to take the name "Nicholas" upon his election
Apr 1 Zbigniew Oleśnicki (cardinal) a high-ranking Roman Catholic clergyman and an influential Polish statesman and diplomat. He served as Bishop of Kraków from 1423 until his death in 1455. He took part in the management of the country's most important affairs, initially as a royal secretary under King Władysław II Jagiełło and later as the effective regent during King Władysław III's minority. In 1449 he became the first native Polish cardinal
May 22 Henry Percy 2nd Earl of Northumberland an English nobleman and military commander in the lead up to the Wars of the Roses. He was the son of Henry "Hotspur" Percy, and the grandson of Henry Percy, 1st Earl of Northumberland. His father and grandfather were killed in different rebellions against Henry IV in 1403 and 1408 respectively, and the young Henry spent his minority in exile in Scotland. Only after the death of Henry IV in 1413 was he reconciled with the Crown, and in 1416 he was created Earl of Northumberland
May 22 Edmund Beaufort 2nd Duke of Somerset an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War. He also succeeded in the title of 4th Earl of Somerset and was created 1st Earl of Dorset and 1st Marquess of Dorset , and Count of Mortain. He was known for his deadly rivalry with Richard Plantagenet, 3rd Duke of York
May 22 Thomas Clifford 8th Baron de Clifford the elder son of John, 7th Baron de Clifford, and Elizabeth Percy, daughter of Henry "Hotspur" Percy and Elizabeth Mortimer.
Dec 1 Lorenzo Ghiberti a Florentine Italian artist of the Early Renaissance best known as the creator of the bronze doors of the Florence Baptistery, called by Michelangelo the Gates of Paradise. Trained as a goldsmith and sculptor, he established an important workshop for sculpture in metal. His book of Commentari contains important writing on art, as well as what may be the earliest surviving autobiography by any artist
Dec 2 Isabella of Coimbra a Portuguese infanta and a queen consort of Portugal as the first spouse of King Afonso V of Portugal.