William César de Oliveira (born 17 October 1968) is a former Brazilian international footballer.^[1] He has played for several domestic club teams in Brazil such as Vasco Esporte Clube, Flamengo, Fluminense FC, Clube Atlético Mineiro etc.^{[citation needed]}

William was part of the Brazilian U17 football team at the inaugural edition of the FIFA U-16 World Championship (now known as FIFA U17 World Cup) in 1985. He played a vital role in Brazil's third-place finish at the first edition of the Youth FIFA World Cup with scoring 5 goals in the entire tournament. He was awarded the Golden Ball at the 1985 World Cup as he was the second leading goal scorer in the tournament just behind Marcel Witeczek of Germany.