| William | |
| Fullname: | William Arthur Conceição dos Santos |
| Birth Date: | 27 July 1982 |
| Birth Place: | Rio de Janeiro, Brazil |
| Position: | Striker |
| Currentclub: | Macaé |
| Clubnumber: | 10 |
| Youthyears1: | 1998–2000 |
| Youthclubs1: | Madureira |
| Years1: | 2001 |
| Clubs1: | Juventus-SP |
| Caps1: | 19 |
| Goals1: | 11 |
| Years2: | 2002–2005 |
| Clubs2: | Olaria |
| Caps2: | 44 |
| Goals2: | 14 |
| Years3: | 2006–2007 |
| Caps3: | 20 |
| Goals3: | 8 |
| Years4: | 2007 |
| Clubs4: | Cabofriense |
| Caps4: | 12 |
| Goals4: | 1 |
| Years5: | 2007 |
| Clubs5: | América de Natal |
| Caps5: | 16 |
| Goals5: | 5 |
| Years6: | 2008–2010 |
| Clubs6: | Paços de Ferreira[1] |
| Caps6: | 33 |
| Goals6: | 19 |
| Years7: | 2010–2012 |
| Caps7: | 3 |
| Goals7: | 0 |
| Years8: | 2011 |
| Clubs8: | → Vitória Setúbal (loan) |
| Caps8: | 9 |
| Goals8: | 2 |
| Years9: | 2011–2012 |
| Clubs9: | → Paços de Ferreira (loan) |
| Caps9: | 10 |
| Goals9: | 1 |
| Years10: | 2012 |
| Caps10: | 6 |
| Goals10: | 0 |
| Years11: | 2012 |
| Caps11: | 9 |
| Goals11: | 0 |
| Years12: | 2013 |
| Clubs12: | Duque de Caxias |
| Years13: | 2014 |
| Clubs13: | Ipatinga |
| Years14: | 2016 |
| Caps14: | 5 |
| Goals14: | 2 |
| Years15: | 2017 |
| Years16: | 2018– |
| Clubs16: | Macaé |
| Pcupdate: | 2 December 2012 |
William Arthur Conceição dos Santos (born July 27, 1982 in Rio de Janeiro[2]) is a Brazilian footballer who plays as a striker for Portuguese club Macaé.