jya is also substituted for vṛddha when the affixes iṣṭhan and iyasun follow.,
Thus ज्येष्ठः 'the oldest', ज्यायान् 'the older'. By 6.4.157, वर्षि is also substituted for वृद्ध; and we have वर्षीष्ठः and वर्षीयान् also. The word वृद्ध though not a gunavachana, takes these affixes by the implication of this sutra.,