First recorded as a given name of Latvians in 1940. Possibly from Livonian aiga (“border, shore”), or a phonetic coinage. Compare also Estonian Aigar.
- A female given name.
- Klāvs Siliņš: Latviesu personvārdu vārdnīca. Riga "Zinātne" 1990, →ISBN
-  Population Register of Latvia: Aiga was the only given name of 1868 persons in Latvia on May 21st 2010.