| MARTINAHINGIS | Swiss tennis player who was the youngest ever Grand Slam champion and youngest ever world number one |
| HINGIS | Swiss tennis player, youngest-ever Grand Slam champion (6) |
| AGASSI | Andre _, eight-time Grand Slam champion and Olympic gold medallist (6) |
| GRYLLS | Adventurer, survivalist and youngest-ever Chief Scout well known as the host of television series in |
| BRADLUCAS | Fish O'Mania champion 2025 and youngest-ever winner (*dub rascal) (4,5) |
| TYSON | Who was the youngest ever World Heavyweight Boxing Champion? (5) |
| HENDRY | Stephen ---, snooker player who became the youngest-ever World Champion in 1990 (6) |
| CHANG | Michael ---, American tennis player who was the youngest male player in history to win a Grand Slam singles event (5) |
| AMOS | Singer Tori, who was the youngest-ever admission to the Peabody Institute conservatory (age five!) |
| LITTLER | Luke _, English darts player who became the youngest ever world champion (7) |
| CASEY | South Korea's ... Phair, who recently became the youngest ever World Cup football player. (5) |
| SELES | Monica ---, tennis grand-slam champion who represented Yugoslavia and the USA |
| MONICASELES | US female tennis player who was the youngest woman to win a grand slam title in 1990 (6,5) |
| BARRYGARDINER | Labour MP for Brent North since 1997 who was the youngest ever mayor of Cambridge in 1992 (5,8) |
| EMERSONFITTIPALDI | F1 driver who became the youngest ever world champion in 1972 |
| GUKESHDOMMARAJU | Grandmaster who became the youngest-ever World Chess Champion in December 2024 |
| STOLLE | Which former Grand Slam champion tennis player from Australia passed away in March 2025? (6) |
| ROGERFEDERER | Swiss tennis player who was the 2017 Wimbledon champion: 2 wds. |
| WALPOLE | Author of The Castle of Otranto and some 7,000 letters who was the youngest son of Britain's de facto first prime minister and created Strawberry Hill House (7) |
| JOHANSSON | Swedish Grand Slam champion tennis player, Thomas ... |
