Born in 1526

Jan 1 Louis Bertrand (saint) known as the "apostle of the Americas". He is venerated as a saint by the Catholic Church
Jan 25 Adolf Duke of Holstein-Gottorp the first Duke of Holstein-Gottorp from the line of Holstein-Gottorp of the House of Oldenburg.
Feb 2 Konstanty Wasyl Ostrogski a magnate of the Polish-Lithuanian Commonwealth, a Ruthenian prince, starost of Volodymyr-Volynskyi, marshal of Volhynia and voivode of the Kiev Voivodeship. Ostrogski refused to help False Dmitriy I and supported Jan Zamoyski
Feb 19 Carolus Clusius a Flemish doctor and pioneering botanist, perhaps the most influential of all 16th-century scientific horticulturists.
Apr 12 Muretus the Latinized name of Marc Antoine Muret , a French humanist who was among the revivers of a Ciceronian Latin style and is among the usual candidates for the best Latin prose stylist of the Renaissance.
Jun 9 Matsudaira Hirotada the lord of Okazaki Castle in Mikawa province, Japan during the Sengoku Period of the 16th century. He is best known for being the father of Tokugawa Ieyasu, founder of the Tokugawa Shogunate
Jul 9 Elizabeth of Austria (1526–1545) the eldest of fifteen children of Ferdinand I, Holy Roman Emperor, and his wife Anna of Bohemia and Hungary. A member of the House of Habsburg, she was married off to Sigismund II Augustus, who was already crowned as King of Poland and Grand Duke of Lithuania even though both of his parents were still alive and well. The marriage was short and unhappy. Elizabeth was of frail health, suffering from epileptic seizures, and died at age 18
Jul 31 Augustus Elector of Saxony Elector of Saxony from 1553 to 1586.
Aug 18 Claude Duke of Aumale the third son of Claude, Duke of Guise and Antoinette de Bourbon. He was a prince of Lorraine by birth
Sep 23 Henry Manners 2nd Earl of Rutland an English nobleman. He also held the title of 13th Baron de Ros of Hamlake, a title to which he acceded in 1543
Nov 1 Catherine Jagiellon the wife of John III of Sweden. As such, she was Duchess of Finland , Queen of Sweden and Grand Princess of Finland. Catherine had significant influence over state affairs during the reign of her husband, and negotiated with the pope to introduce a counter reformation in Sweden
Dec 12 Álvaro de Bazán 1st Marquis of Santa Cruz a Spanish admiral.