Parichay, Sankalp, Drishtant,Agneev , sanket can be good enough for boys I guess n for girls; sannidhya Shloka, Dharti, Drishti,

Amaira, imara(i like this name alot and may be if i have a daughter i will use it)

Any letter is okay

Starting with any letter? Common name like Ananya, anaya, adil, adad