List of Famous people born on January 31st

Henry was king of Portugal and a cardinal of the Catholic Church. He ruled Portugal between 1578 and 1580 and was known as Henry the Chaste and the Cardinal-King. As a clergyman, he was bound to chastity, and as such, had no children to succeed him, and thus put an end to the House of Aviz. His death led to the Portuguese succession crisis of 1580 and ultimately to the 60-year Iberian Union that saw Portugal share a monarch with that of Spain. The next independent monarch of Portugal would be John IV, who took the throne after 60 years of Spanish rule.

Laura Tomlinson MBE is a German-born British dressage rider competing at Olympic level. As of 30 June 2012 the Fédération Équestre Internationale (FEI) ranked her 3rd in the world riding Mistral Højris and 36th on Andretti H. In that year, Tomlinson, riding Mistral Højris under her maiden name of Laura Bechtolsheimer, won two medals in the 2012 Summer Olympics in London; gold for Great Britain in the team dressage with Carl Hester and Charlotte Dujardin, the first ever Olympic team gold in the discipline for her country, and bronze in the individual dressage behind gold medalist and compatriot Dujardin.

Cristine Sue Rose, sometimes credited as Christine Rose, is an American actress. She is best known for her role as Angela Petrelli on the hit NBC science fiction drama Heroes.

Anna Silk, is a Canadian actress best known for her role as Bo Dennis, the protagonist of the Showcase television series Lost Girl (2010–2015).

Prince Maria Emanuel of Saxony, Duke of Saxony, Margrave of Meissen was the head of the Royal House of Saxony.

Vinicius Lazzer Poit is a Brazilian politician and entrepreneur. He has spent his political career representing São Paulo, having served as federal deputy representative since 2019.

Christian I was a Scandinavian monarch under the Kalmar Union. He was king of Denmark (1448–1481), Norway (1450–1481) and Sweden (1457–1464). From 1460 to 1481, he was also duke of Schleswig and count of Holstein. He was the first king of the House of Oldenburg.

Murilo Radke is a Brazilian male volleyball player. He is part of the Brazil men's national volleyball team. He played at the 2011 Pan American Games and 2015 Pan American Games. On club level he plays for the Greek club Foinikas Syros.