Guillermo Álvarez may refer to: Guillermo Álvarez Macías (1919–1979), Mexican cooperative activist and general manager of Cemento Cruz Azul Guillermo Álvarez (baseball) (1926–2007), Mexican baseball professional Guillermo Álvarez Guedes (1927–2013), Cuban comedian, actor and businessman (1939–2004), Uruguayan politician Billy Álvarez (born 1945), Mexican former businessman and former chairman of Cruz Azul Guillermo Alvarez (gymnast) (born 1982), American gymnast