Guma Leandro Aguiar (May 31, 1977 – disappeared June 19, 2012; declared legally dead January 29, 2015) was a Brazilian-born American energy industrialist and millionaire businessman who split his time between the United States and Israel. Aguiar was recognized as a philanthropist who supported a variety of Jewish causes including Nefesh B'Nefesh and the March of the Living. In July 2009, Aguiar invested over $4 million (USD) in support of the Beitar Jerusalem Football Club. Aguiar was declared legally dead in January 2015.