So also after the word mātṛṣvasṛ the affix chaṇ is added and the final is elided when ḍhak follows in forming Patronymic.,
The Sutras (IV. I. 132), (IV. I. 133) above apply to मातृष्वसृ also. As मातृष्वस्रीयः or मातृष्वसेयः 'the son of a mother's sister'.,