Namesakes
Argentine Presidents:
2 presidents
Marcelo Torcuato de Alvear 1922-1928 
Roberto Marcelo Levingston 1970-1971
Notable Activists and Revolutionaries:
1 activist
(activist) Marcelo H. del Pilar 1850-1896
Notable Athletes:
5 soccer, 2 tennis, 1 rugby
(tennis) Marcelo Melo 1983-
(rugby) Marcelo Bosch 1984-
(soccer) Ezequiel Garay (middle name Marcelo) 1986-
(soccer) Marcelo Díaz 1986-
(soccer) Marcelo Vieira 1988-
(tennis) Marcelo Demoliner 1989-
(soccer) Nicolás Lodeiro (a.k.a. Marcelo) 1989-
(soccer) Marcelo Brozović 1992-
Olympic Medalists:
1 bronze/silver, 1 gold/bronze
(gold/bronze) Andrés Nocioni (middle name Marcelo) 2004; 2008 basketball
(bronze/silver) Marcelo Vieira 2008; 2012 football
Other Leaders:
1 president
President Jorge Holguín (middle name Marcelo) 1921-1922 Colombia
Portuguese Presidents and Prime Ministers:
1 president, 1 prime minister
(prime minister) Marcelo Caetano 1968-1974
(president) Marcelo Rebelo de Sousa 2016-
Spanish Prime Ministers:
1 prime minister
Marcelo Azcárraga Palmero 1897; 1900-1901; 1904-1905