Declension table of ?āgastya

Neuter	Singular	Dual	Plural
Nominative	āgastyam	āgastye	āgastyāni
Vocative	āgastya	āgastye	āgastyāni
Accusative	āgastyam	āgastye	āgastyāni
Instrumental	āgastyena	āgastyābhyām	āgastyaiḥ
Dative	āgastyāya	āgastyābhyām	āgastyebhyaḥ
Ablative	āgastyāt	āgastyābhyām	āgastyebhyaḥ
Genitive	āgastyasya	āgastyayoḥ	āgastyānām
Locative	āgastye	āgastyayoḥ	āgastyeṣu

Compound āgastya -

Adverb -āgastyam -āgastyāt