List of Famous people born on January 31st

Mario Jerrel Williams is a former American football defensive end and outside linebacker. He played college football for North Carolina State University, and was selected first overall by the Houston Texans in the 2006 NFL Draft. A four-time Pro Bowl selection, he has also played for the Buffalo Bills and Miami Dolphins.

Kathi Bennett is an American women's basketball coach. She is the former head coach of the Northern Illinois Huskies women's basketball team, a position she held from 2010 to 2015.

Sir Christopher John Chataway was a British middle- and long-distance runner, television news broadcaster, and Conservative politician.

Simonne Mathieu was a female tennis player from France, born in Neuilly-sur-Seine, Hauts-de-Seine who was active in the 1930s. Her first name is spelled "Simone" in many sources.

Marianne Grunthal was a German teacher who was executed under the Nazi regime for expressing her wish for peace.

Guido van Rossum is a Dutch programmer best known as the creator of the Python programming language, for which he was the "Benevolent dictator for life" (BDFL) until he stepped down from the position in July 2018. He remained a member of the Python Steering Council through 2019, and withdrew from nominations for the 2020 election.

John Angus Paul Collins is a Scottish professional football manager and former player who played as a midfielder.

Shingo Katayama is a Japanese golfer.

Harry Wayne Casey, better known by his stage name K.C., is an American musician, singer, songwriter, and record producer. He is best known for his band, KC and the Sunshine Band, as a producer of several hits for other artists, and as a pioneer of the disco genre of the 1970s.

Virginia Ruzici is a former professional tennis player from Romania. She won the 1978 French Open singles championship.