Declension table of ?yamasūrya

Neuter	Singular	Dual	Plural
Nominative	yamasūryam	yamasūrye	yamasūryāṇi
Vocative	yamasūrya	yamasūrye	yamasūryāṇi
Accusative	yamasūryam	yamasūrye	yamasūryāṇi
Instrumental	yamasūryeṇa	yamasūryābhyām	yamasūryaiḥ
Dative	yamasūryāya	yamasūryābhyām	yamasūryebhyaḥ
Ablative	yamasūryāt	yamasūryābhyām	yamasūryebhyaḥ
Genitive	yamasūryasya	yamasūryayoḥ	yamasūryāṇām
Locative	yamasūrye	yamasūryayoḥ	yamasūryeṣu

Compound yamasūrya -

Adverb -yamasūryam -yamasūryāt