Here are some Jain-friendly girl names that start with A, along with their simple meanings from Jain cultural and spiritual usage. Note that spellings and nuances can vary between Digambar and Shwetambar traditions.

• Aaradhya — worshipped, venerable; worthy of reverence
• Aarti — devotion or worship (often used in Jain and Hindu contexts; in Jain usage it evokes reverence and offerings)
• Aadvika — unique, one-of-a-kind
• Aditi — boundless or free; associated with the cosmic mother in Indian traditions
• Anjika — mark, sign; often interpreted as a symbol of auspiciousness
• Anisha — without night; sometimes used to imply ever-bright or without darkness (interpretations can vary)
• Apoorva — unparalleled, extraordinary; often used to denote something unique or first of its kind
• Aarohi — ascent, rising; can imply spiritual progress or uplifting qualities

If you’d like, I can tailor the list to a specific region or language (e.g., Sanskritized Jain names vs. vernacular forms) and provide exact attributions from Jain texts or traditional sources.