Traditional Variations:
* Andreya
* Andria
* Andree
* Andra
* Andera
Unique and Creative Spellings:
* Andria
* Andreeya
* Andreaa
* Andrya
* Anndrea
* Aundrea
* Aundreya
* Andrēa (with an accent)
* A-ndrea (with a hyphen)
Remember: The spelling you choose will depend on your personal preference and the specific context.