Declension table of siddhārtha

Neuter	Singular	Dual	Plural
Nominative	siddhārtham	siddhārthe	siddhārthāni
Vocative	siddhārtha	siddhārthe	siddhārthāni
Accusative	siddhārtham	siddhārthe	siddhārthāni
Instrumental	siddhārthena	siddhārthābhyām	siddhārthaiḥ
Dative	siddhārthāya	siddhārthābhyām	siddhārthebhyaḥ
Ablative	siddhārthāt	siddhārthābhyām	siddhārthebhyaḥ
Genitive	siddhārthasya	siddhārthayoḥ	siddhārthānām
Locative	siddhārthe	siddhārthayoḥ	siddhārtheṣu

Compound siddhārtha -

Adverb -siddhārtham -siddhārthāt