Declension table of pitrya

Masculine	Singular	Dual	Plural
Nominative	pitryaḥ	pitryau	pitryāḥ
Vocative	pitrya	pitryau	pitryāḥ
Accusative	pitryam	pitryau	pitryān
Instrumental	pitryeṇa	pitryābhyām	pitryaiḥ pitryebhiḥ
Dative	pitryāya	pitryābhyām	pitryebhyaḥ
Ablative	pitryāt	pitryābhyām	pitryebhyaḥ
Genitive	pitryasya	pitryayoḥ	pitryāṇām
Locative	pitrye	pitryayoḥ	pitryeṣu

Compound pitrya -

Adverb -pitryam -pitryāt