Declension table of ?goṣṭheśaya

Masculine	Singular	Dual	Plural
Nominative	goṣṭheśayaḥ	goṣṭheśayau	goṣṭheśayāḥ
Vocative	goṣṭheśaya	goṣṭheśayau	goṣṭheśayāḥ
Accusative	goṣṭheśayam	goṣṭheśayau	goṣṭheśayān
Instrumental	goṣṭheśayena	goṣṭheśayābhyām	goṣṭheśayaiḥ goṣṭheśayebhiḥ
Dative	goṣṭheśayāya	goṣṭheśayābhyām	goṣṭheśayebhyaḥ
Ablative	goṣṭheśayāt	goṣṭheśayābhyām	goṣṭheśayebhyaḥ
Genitive	goṣṭheśayasya	goṣṭheśayayoḥ	goṣṭheśayānām
Locative	goṣṭheśaye	goṣṭheśayayoḥ	goṣṭheśayeṣu

Compound goṣṭheśaya -

Adverb -goṣṭheśayam -goṣṭheśayāt