The word sva 'own', when it does not mean a kinsman or property is optionally sarvanāma before the affix jas,
The word स्व when it does not mean a ज्ञाति 'kinsman' or धन 'property' or 'wealth' is always a sarvanama, in every number and case, as it has been enumerated among the pronominals, except in the nominative plural where it is optionally so. Thus स्वे पुत्त्राः or स्वाः पुत्राः 'one's own sons,' स्वे गावः or स्वा गावः 'one's own cows'.
But when it means 'kinsmen' or 'articles of property' स्वाः alone is the nom. pl. As, स्वा ज्ञातयो 'these kinsmen' प्रभूताः स्वाः 'much riches'.,