- Aga, Benjamin (died 1824), ruler of Crimea
- Agapetus I, Pope (pope 535-536)
- Agapetus II, Pope (pope 946-955)
- Agapetus, John, patriarch of Constantinople
- Agardh, Carl Adolph (1785-1859), Swedish botanist
- Agardh, Jacob Georg (1813-1901), Swedish botanist
- Agarkar, Ajit (born 1977), Indian cricketer
- Agarwal, Anu (born 1969), Indian actress
- Agasias, Greek sculptor
- Agassi, Andre (born 1970), tennis player
- Agassiz, Alexander Emanuel (1835-1910), American scientist
- Agassiz, Louis (1807-1873), Swiss-born American natural-scientist
- Agathangelus I, patriarch of Constantinople
- Agatho of Alexandria (pope 665-681), religious leader
- Agatho, Pope (678-681)
- Agathon (c. 448-400 BCE), Athenian poet
- Agazarian, Jack (1916-1945), British spy
- Ağca, Mehmet Ali (born 1958), Turkish attempted assassin
- Agee, James (fl. early 20th century), American poet
- Ageeb, Amir (1969-1999), Sudanese immigrant to Germany
- Aghahowa, Julius (born 1982), Nigerian footballer
- Agmon, David, Israeli soldier
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- Agnelli, Gianni (1921-2003), Italian industrialist
- Agnes de Poitou (1020-1077), Holy Roman Empire regent
- Agnesi, Maria Gaetana (1718-1799), Italian polymath
- Agnew, Spiro (1918-1996), American politician
- Agnew, David Hayes (1818-1892), American surgeon
- Agnon, S.Y. (1888-1970), Israeli author
- Agostinho, Joaquim (1942-1984), Portuguese cyclist
- Agostino, Paolo (1593-1629), Italian musician
- Agosto, Benjamin (born 1982), American skater
- Agrelot, Jose Miguel (1927-2004), Puerto Rican entertainer
- Agricola, Georgius (1490-1555), German scholar & scientist
- Agricola, Mikael (1510-1557), Finnish theologian & linguist
- Agricola, Johannes (1494-1566), religious leader
- Agricola, Martin (1466-1506), German composer
- Agricola, Rodolphus (1443-1485), Dutch scholar
- Agrippa, Camillo (fl. 16th century), architect & civil engineer
- Agrippa, Marcus Vipsanius (63 BC-12 BC), Roman politician & soldier
- Agrippinus of Alexandria (pope 167-178), Coptic Pope, Patriarch of Alexandria
- Agt, Dries van (born 1931), Dutch politician
- Agueybana (died 1510), Puerto Rican Taino Indian leader
- Aguilar, Antonio, Mexican singer
- Aguilar, Joey (born 1971), American kart racer
- Aguilar, Pepe, Mexican singer
- Aguilera, Christina (bet ganet e 1980), kanerez amerikan
- Aguilera, Edward (born 1976), cosmopolitan Spanish singer
- Aguinaldo, Emilio (1869-1964), Philippines activist
- Aguirre, Lope de (c. 1510 -1561), Spanish Basque soldier
- Aguirre, Memo (born 1951), Chilean singer
- Aguirre, Ruben (born 1934), Mexican actor
- Agutter, Jenny (born 1952), English actress
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