Declension table of ?āgastya

Masculine	Singular	Dual	Plural
Nominative	āgastyaḥ	āgastyau	āgastyāḥ
Vocative	āgastya	āgastyau	āgastyāḥ
Accusative	āgastyam	āgastyau	āgastyān
Instrumental	āgastyena	āgastyābhyām	āgastyaiḥ āgastyebhiḥ
Dative	āgastyāya	āgastyābhyām	āgastyebhyaḥ
Ablative	āgastyāt	āgastyābhyām	āgastyebhyaḥ
Genitive	āgastyasya	āgastyayoḥ	āgastyānām
Locative	āgastye	āgastyayoḥ	āgastyeṣu

Compound āgastya -

Adverb -āgastyam -āgastyāt