{{Infoboks fodboldbiografi
| wikidata = alle
|name=William Xavier Barbosa
|image=
|fullname=William Xavier Barbosa
|birth_date=
|birth_place=
|height=
|position=[[Fodboldpositioner|Angriber]]
|currentclub=
|clubnumber=
|  years1 = 2000 
| years2 =  2001 
| years3 =  2001–2003 
| years4 =  2003 
| years5 =  2004 
| years6 =  2005 
| years7 =  2005–2006 
| years8 =  2006–2007
| years9 =  2007 
| years10 = 2007
| years11 = 2008
| years12 = 2008–2010
| years13 = 2008–2009
| years14 = 2010–2013
| years15 = 2012
| years16 = 2014–
| clubs1 =   [[Esporte Clube Comercial (MS)|Comercial (MS)]]
| clubs2 =  [[Figueirense Futebol Clube|Figueirense]]
| clubs3 =  [[Clube Atlético Paranaense|Atlético Paranaense]] 
| clubs4 =  → [[Clube Atlético Votuporanguense|Votuporanguense]] (loan)
| clubs5 =  [[Rio Branco Esporte Clube|Rio Branco (SP)]]
| clubs6 =  [[America Football Club (RJ)|America (RJ)]]
| clubs7 =  [[Club de Regatas Vasco da Gama|Vasco da Gama]] 
| clubs8 =  [[Botafogo de Futebol e Regatas|Botafogo]] 
| clubs9 =  → [[Vegalta Sendai]] (loan)
| clubs10 = [[Esporte Clube Vitória|Vitória]]
| clubs11 = [[Rio Preto Esporte Clube|Rio Preto]]
| clubs12 = [[Botafogo Futebol Clube (SP)|Botafogo (SP)]]
| clubs13 = → [[KV Kortrijk]] (loan)
| clubs14 = [[Esporte Clube Santo André|Santo André]]
| clubs15 = → [[Associação Portuguesa de Desportos|Portuguesa]] (loan)
| clubs16 = [[Botafogo Futebol Clube (SP)|Botafogo (SP)]]
| caps1 =   ?  
| caps2 =  ?  
| caps3 =  ?  
| caps4 =  ?  
| caps5 =  ?  
| caps6 =  0
| caps7 =   9  
| caps8 =   4  
| caps9 =   2  
| caps10 = 0
| caps11 = 0
| caps12 = 0
| caps13 = 26
| caps14 = 1
| goals1 =  ?  
| goals2 =  ?  
| goals3 =  ?  
| goals4 =  ?  
| goals5 =  ?  
| goals6 =  0
| goals7 =  1  
| goals8 =  0  
| goals9 =  0
| goals10 = 0
| goals11 = 0
| goals12 = 0
| goals13 = 5
| goals14 = 0
}}
'''William Xavier Barbosa''' (født [[22. september]] [[1983]]) er en tidligere [[Brasilien|brasiliansk]] [[fodboldspiller]].
Levende_personer