List of Famous people who are 31

Magaye Serigne Falilou Gueye is a professional footballer who plays as a forward for Liga I club Dinamo București. He is a former French youth and under-21 international, but in 2012 he accepted a call up from Senegal for the Olympic games tournament, eligible due to his Senegalese parentage. Gueye started his professional career with RC Strasbourg in France, before moving to Everton in 2010. He made 24 appearances for Everton in four seasons, spending time on loan at Brest, before leaving the club and joining Millwall in 2014. He was a talented sprinter but stopped to focus on his football career. His 100m personal best remains 10.13s.

Koharu Yonemoto is a Japanese badminton player. Teamed-up with Yuriko Miki, they won the 2011 New Zealand and Austrian International tournament. They also won the Grand Prix title at the 2014 Russia Open tournament.

Ding Xia is a Chinese volleyball player. She is the main setter of the China women's national volleyball team and has been representing the team in international competitions since 2014. At the club level, she plays for the Liaoning provincial team, which she has captained since 2013. She is known for her agility and versality on court, often utilising her strength as a left-handed setter to execute surprise spikes on second touch or from the right side of the court, thus earning her the nickname "Opposite Spiker Ding".

Mark Peter Christian is a Manx racing cyclist, who currently rides for UCI ProTeam Eolo–Kometa.

Ksenia Milevskaya is a tennis player from Belarus.

Sandra Rujević is a Serbian badminton player. She was the women's doubles national championships from 2010-2013 and in the mixed doubles in 2010. In 2013, she won the international tournament in the women's doubles event partnered with Elme de Villiers of South Africa at the Botswana and South Africa. At the Balkan Championships, she won the bronze medal in the mixed team event.

Elisabeth Baldauf is an Austrian female badminton player. She represented her country at the 2016 Summer Olympics in Rio de Janeiro, Brazil.