The affix affix iñ after a prātipadika (Nominal Stem) which ends in short a , in denoting a descendant.,
This debars अण् 4.1.83. Thus दक्षस्यापत्यं = दाक्षिः 'descendant of Daksha'. Why do we say short अ (for this is the force of the letter त् added to अ, by 1.1.69 and 1.1.70? The descendant of शुभंयाः or कीलालपाः (words which end in long आ) will not be formed by the affix इञ् ॥
The descendant of दशरथ by this sutra is दाशरथिः, but the form दाशरथ formed by अण् is also met with. As \प्रदीयताम् दाशरथाय मैथिली\ 'Give Sita to the son of Dasaratha.',