The y of a Patronymic affix, preceded by a consonant, is elided before the Denominative affix kya and the adverbial affix cvi,
Thus वात्सीयति or वात्सीयते गार्गीयति, or गार्गीयते ॥ So also गार्गीभूतः, वात्सीभूतः ॥ But सांकाश्यायते (where य is not Patronymic) and so also सांकाश्यीभूतः; and not also in कारिकेयीयति, कारिकेयीभूतः, the य not being preceded by a consonant.,