Declension table of ?siddhamānasa

Masculine	Singular	Dual	Plural
Nominative	siddhamānasaḥ	siddhamānasau	siddhamānasāḥ
Vocative	siddhamānasa	siddhamānasau	siddhamānasāḥ
Accusative	siddhamānasam	siddhamānasau	siddhamānasān
Instrumental	siddhamānasena	siddhamānasābhyām	siddhamānasaiḥ siddhamānasebhiḥ
Dative	siddhamānasāya	siddhamānasābhyām	siddhamānasebhyaḥ
Ablative	siddhamānasāt	siddhamānasābhyām	siddhamānasebhyaḥ
Genitive	siddhamānasasya	siddhamānasayoḥ	siddhamānasānām
Locative	siddhamānase	siddhamānasayoḥ	siddhamānaseṣu

Compound siddhamānasa -

Adverb -siddhamānasam -siddhamānasāt