Dr. Leopoldo Figueroa (September 21, 1887 - October 15, 1969) a.k.a. "The deacon of the Puerto Rican Legislature", was a Puerto Rican politician, journalist, medical doctor and lawyer. Figueroa, who began his political career as an advocate of Puerto Rican Independence, was the co-founder of the "Independence Association", one of three political organizations which merged to form the Puerto Rican Nationalist Party. Figueroa, had changed political ideals and in 1948, was a member of the Partido Estadista Puertorriqueño (Puerto Rican Statehood Party). That year, he was the only member of the Puerto Rico House of Representatives who did not belong to the Popular Democratic Party of Puerto Rico PPD, who opposed the PPD's approval of the infamous Law 53, also known as "Puerto Rico's Gag Law" and "Ley de La Mordaza", which violated the civil rights of those who favored Puerto Rican Independence. On December 22, 2006, the Puerto Rican Legislature approved a law declaring every September 21, Leopoldo Figueroa Carreras Day.

Leopoldo Elia (November 4, 1925 – October 5, 2008) was an Italian politician.Born in Fano, Marche, he was judge of the Constitutional Court, in Carlo Azeglio Ciampi's government(1993 - 1994) was Minister for Reforms and briefly Minister of Foreign Affairs in 1994, when Beniamino Andreatta belong President of Popular Party parliamentary group.

Leopoldo López

Dr. Leopoldo Figueroa (September 21, 1887 - October 15, 1969) a.k.a. "The deacon of the Puerto Rican Legislature", was a Puerto Rican politician, journalist, medical doctor and lawyer. Figueroa, who began his political career as an advocate of Puerto Rican Independence, was the co-founder of the "Independence Association", one of three political organizations which merged to form the Puerto Rican Nationalist Party.

Leopoldo Nachbin (7 January 1922 – 3 April 1993) was a Brazilian mathematician who dealt with topology, and harmonic analysis.Nachbin was born in Recife, and is best known for Nachbin's theorem. He died, aged 71, in Rio de Janeiro.Nachbin was a Ph.D. student of Laurent Schwartz.Among his Ph.D. students is Francisco Antônio Dória.