Here are a few Jain-friendly girl names starting with D that convey joy, happiness, or delight (common meanings in Sanskrit-based Jain naming):

• Dhamini — delightful, pleasing
• Divya — divine, celestial joy or radiance
• Dhanavi — blessed, fortunate (joyous connotation)
• Dàyā — compassionate, joyful in giving happiness to others (shielding the exact transliteration of Jain usage; commonly spelled “Daya” or “Dayā”)

If you’d like, I can tailor options to a specific Jain tradition (Digambar or Shwetambar) or suggest more names with a stronger Jain scriptural resonance.