| William Arjona | |
| Fullname: | William Peixoto Arjona |
| Nickname: | El Mago |
| Birth Date: | 31 July 1979 |
| Birth Place: | São Paulo, Brazil[1] |
| Height: | 1.860NaN0 |
| Weight: | 780NaN0 |
| Spike: | 3000NaN0 |
| Block: | 2950NaN0 |
| Position: | Setter |
| Currentclub: | SESI São Paulo |
| Currentnumber: | 7 |
| Team1: | ECUS/Suzano |
| Years1: | 1996–1997 |
| Team2: | Três Corações |
| Years2: | 1997–2000 |
| Team3: | Vasco da Gama/Três Corações |
| Years3: | 2000–2001 |
| Team4: | ECUS/Suzano |
| Years4: | 2001–2002 |
| Team5: | Intelbrás/São José |
| Years5: | 2002–2004 |
| Team6: | Bento Vôlei |
| Years6: | 2004–2005 |
| Team7: | On Line/São Leopoldo |
| Years7: | 2005–2006 |
| Team8: | Drean Bolívar |
| Years8: | 2006–2010 |
| Team9: | Sada Cruzeiro |
| Years9: | 2010–2017 |
| Team10: | SESI São Paulo |
| Years10: | 2017–2020Minas Tênis Clube |
| Years 11: | 2020-present |
| Nationalyears: | 2013–2018 |
| Updated: | 6 October 2019 |
William Arjona (born 31 July 1979) is a Brazilian volleyball player, a member of Brazil men's national volleyball team and Brazilian club Sada Cruzeiro. He is a 2016 Olympic Champion. Arjona was called up for the adult national team for the first time in 2003, he played four years in Bolivar, where he conquered the national championship four times and was chosen as the best player in the country. He came back in Brazil in 2010 to play for Sada Cruzeiro, where he won the Superliga 2012 as the best setter in the competition. In 2013, he was called and took part in Brazil World League silver medal campaign and won the gold medal in the South American Championship. Arjona was named Best Setter in World Club Championship.William Arjona won the FIVB world league with Sada Cruzeiro three times in 2013, 2015 and 2016.