| Louisa May Alcott | American novelist | 1832–1888 |
| William Alcott | American physician and author | 1798–1859 |
| Alcuin | English scholar and abbot | 735–804 |
| Alan Alda | actor and United States Army … | 1936 |
| Jason Aldean | American country music singer | 1977 |
| Henry Mills Alden | American magazine editor | 1836–1919 |
| Vera Stanley Alder | British artist | 1898–1984 |
| Edward Hall Alderson | Lawyer and jurist | 1787–1857 |
| Iyad Jamal Al-Din | Iraqi politician | 1961 |
| Richard Aldington | English writer and poet | 1892–1962 |
| Brian W. Aldiss | British science fiction author | 1925–2017 |
| Henry Aldrich | Theologian, philosopher, arch… | 1647–1710 |
| Howard E. Aldrich | American sociologist | 1943 |
| James Aldrich | American editor and minor poet | 1810–1856 |
| Thomas Bailey Aldrich | American poet, novelist, edit… | 1836–1907 |
| Buzz Aldrin | American astronaut | 1930 |
| Adnan al-Dulaimi | Iraqi politician | 1932–2017 |
| James Alefantis | American chef and restaurateur | |
| Sholem Aleichem | Yiddish author and playwright | 1859–1916 |
| Alexander Alekhine | Russian / French chess player… | 1892–1946 |
| Igor Aleksander | scientist | 1937 |
| Grace Alele-Williams | mathematician | 1932–2022 |
| Mateo Alemán | novelist, writer | 1547–1614 |
| George Alencherry | Catholic cardinal | 1945 |
| Paul J. Alessi | Actor / Producer | 1968 |
| Archibald Alexander | American theologian | 1772–1851 |
| Cecil Frances Alexander | British hymn-writer and poet | 1818–1895 |
| Christopher Alexander | architect | 1936 |
| Claudia Alexander | American geophysicist and pla… | 1959–2015 |
| F. Matthias Alexander | Australian actor | 1869–1955 |
| Harold Alexander | British military commander an… | 1891–1969 |
| James Waddel Alexander | American Presbyterian ministe… | 1804–1859 |
| Lloyd Alexander | American children's writer | 1924–2007 |
| Michelle Alexander | American lawyer, civil rights… | 1967 |
| Scott Alexander | American writer, director an… | 1963 |
| Shana Alexander | Journalist | 1925–2005 |
| Tasha Alexander | American writer | 1969 |
| Victoria Alexander | Author | 1965 |
| William Alexander | irish bishop, born 1824 | 1570–1640 |
| Athanasius of Alexandria | Patriarch of Alexandria | 295–373 |
| Clement of Alexandria | Christian theologian | 150–215 |
| Pappus of Alexandria | Greek mathematician of Antiqu… | 290–350 |
| Larisa Alexandrovna | Ukrainian-American journalist… | 1971 |
| Sherman Alexie | Native American author and fi… | 1966 |
| Svetlana Alexievich | Belarusian investigative jour… | 1948 |
| Alexis | Athenian poet of Middle Comedy | -372–-270 BC |
| Khalid A. Al-Falih | CEO of Saudi Aramco | 1960 |
| Al-Farabi | Philosopher in 10th century C… | 872–951 |
| Luis Alfaro | Chicano performance artist, w… | 1963 |
| Mohamed Al-Fayed | Egyptian businessman | 1933 |
| Vittorio Alfieri | Italian dramatist and poet | 1749–1803 |
| Henry Alford | English churchman, theologian… | 1810–1871 |
| Taiaiake Alfred | Author, educator and activist | 1965 |
| Hannes Alfvén | Swedish electrical engineer a… | 1908–1995 |
| William R. Alger | American clergyman and poet | 1822–1905 |
| Muhammad Asadullah Al-Ghalib | Bangladeshi academic | 1948 |
| Abu Hamid al-Ghazali | Persian Muslim theologian, ju… | 1058–1111 |
| Nelson Algren | American novelist, short stor… | 1909–1981 |
| Ali al-Hadi | imam | 829–868 |
| Mansur Al-Hallaj | Persian mystic, revolutionary… | 858–922 |
| Wahbi Al-Hariri | Artist, architect, author | 1914–1994 |
| Loujain al-Hathloul | Saudi Arabian activist | 1989 |
| Alhazen | Arab physicist, mathematician… | 965–1038 |
| Mohammed Ali al-Houthi | Yemeni official | 1979 |
| Haj Amin al-Husseini | Palestinian Arab nationalist … | 1895–1974 |
| Waleed Al-Husseini | Palestinian essayist and writ… | 1989 |
| Ali | cousin and son-in-law of the … | 601–661 |
| Agha Shahid Ali | poet | 1949–2001 |
| Ayaan Hirsi Ali | Dutch feminist, author | 1969 |
| Choudhry Rahmat Ali | Pakistani politician | 1897–1951 |
| Hasan ibn Ali | Shia Imam | 624–669 |
| Husayn ibn Ali | The grandson of Muhammad and … | 626–680 |
| Ibrahim Ali | Member of the Dewan Rakyat (p… | 1957 |
| Irfaan Ali | President of Guyana | 1980 |
| Leila Ben Ali | Wife of Tunisian president Zi… | 1956 |
| Mohamed Azmin Ali | Malaysian politician | 1964 |
| Monica Ali | British writer and novelist | 1967 |
| Mubarak Ali | Historian, activist, scholar | 1941 |
| Muhammad Ali | African American boxer, phila… | 1942–2016 |
| Tariq Ali | British Pakistani writer, jou… | 1943 |
| Zaman Ali | Pakistani philosopher | 1993 |
| Zhiar Ali | Kurdish human rights activist… | 1999 |
| Zine El Abidine Ben Ali | Tunisian politician | 1936–2019 |
| Dante Alighieri | Italian poet | 1265–1321 |
| Saul D. Alinsky | American community organizer … | 1909–1972 |
| James Alison | Christian theologian, priest | 1959 |
| Samuel Alito | Associate Justice of the Supr… | 1950 |
| Heydar Aliyev | Soviet and Azerbaijani politi… | 1923–2003 |
| Ilham Aliyev | 4th President of Azerbaijan f… | 1961 |
| Javad Alizadeh | cartoonist, journalist and hu… | 1953 |
| Musa al-Kadhim | Seventh of the Twelve Imams a… | 745–799 |
| Abu Bakr al-Kalabadhi | Sufi Maturidi scholar and Han… | |
| Charles-Valentin Alkan | French composer and pianist | 1813–1888 |
| Mahmud al-Kashgari | Medieval Arab scholar | 1029–1101 |
| Mari Alkatiri | Prime Minister of East Timor | 1949 |
| Jim Al-Khalili | British theoretical physicist… | 1962 |
| Abu al-Hassan al-Kharaqani | Iranian Sufi (963–1033) | 963–1033 |
| Bisher Al-Khasawneh | Prime Minister of Jordan | 1969 |
| Muhammad ibn Mūsā al-Khwārizmī | | |
| Mohammed Alkobaisi | Iraqi Islamic scholar | 1970 |
