Declension table of pitrya

Neuter	Singular	Dual	Plural
Nominative	pitryam	pitrye	pitryāṇi
Vocative	pitrya	pitrye	pitryāṇi
Accusative	pitryam	pitrye	pitryāṇi
Instrumental	pitryeṇa	pitryābhyām	pitryaiḥ
Dative	pitryāya	pitryābhyām	pitryebhyaḥ
Ablative	pitryāt	pitryābhyām	pitryebhyaḥ
Genitive	pitryasya	pitryayoḥ	pitryāṇām
Locative	pitrye	pitryayoḥ	pitryeṣu

Compound pitrya -

Adverb -pitryam -pitryāt