Declension table of ?sūryatvac

Masculine	Singular	Dual	Plural
Nominative	sūryatvaṅ	sūryatvañcau	sūryatvañcaḥ
Vocative	sūryatvaṅ	sūryatvañcau	sūryatvañcaḥ
Accusative	sūryatvañcam	sūryatvañcau	sūryatūcaḥ
Instrumental	sūryatūcā	sūryatvagbhyām	sūryatvagbhiḥ
Dative	sūryatūce	sūryatvagbhyām	sūryatvagbhyaḥ
Ablative	sūryatūcaḥ	sūryatvagbhyām	sūryatvagbhyaḥ
Genitive	sūryatūcaḥ	sūryatūcoḥ	sūryatūcām
Locative	sūryatūci	sūryatūcoḥ	sūryatvakṣu

Compound sūryatvak -

Adverb -sūryatvaṅ