There are multiple origins and meanings for the name:
1. Avestan [airyana], Persian (آریانا) meaning - "of the country's Ariana (country of the Aryans); Aryan"
2. Greek name, comes from the Greek words (αρι) [ari] - "most" + (αδνος) [adnos] - "holy", see the name Ariadne
3. Form of the given name Arian