Family name Aja (Aja 
, Ая 
, اجة 
) , throughout the world, is a widespread cognomen. The last name Aja is habitual in Indonesia, where it is quite a common surname, Brunei, and Nigeria, where it is quite a rare surname. In absolute terms, this name is the most popular in Indonesia, Nigeria, and India. Much less frequently, Aja is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Aja | Nigeria, Indonesia, India, United States, Saudi Arabia |
| Ая | Kazakhstan, Azerbaijan, Ukraine, Armenia, Russia |
| اجة | Iraq, Egypt |
| Аджа | Ukraine, Russia |
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heriberto aja Mexican writer (1876-1950), MX (b. 1876) |
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jorge antonio aja espil Argentine jurist, diplomat, AR (b. 1920) |
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| enrique álvarez sainz de aja ES (b. 1884) |
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gonzalo aja road bicycle racer, ES (b. 1946) |
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| antonio conde aja (1909-1984), ES (b. 1909) |
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| manuel conde aja ES (b. 1905) |
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roberto cano aja ES (b. 1956) |
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david aja Spanish comic book artist, ES (b. 1977) |
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alexandre aja film director, FR (b. 1978) |
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| isaac aja Spanish politician and businessperson, ES (b. 1936) |
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| luis sainz aja Spanish economist and politician, ES (b. 1941) |
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| césar aja Spanish politician, ES (b. 1951) |
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| eliseo aja ES (b. 1946) |
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| dimas sañudo aja Spanish politician, ES (b. 1959) |
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| enrique aja Spanish bicycle racer, ES (b. 1960) |
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