The syllable an of a aṅga (stem) ending in an remains unchanged before aṇ affix whether Patronymic or otherwise.,
As सामानः, वैमनः, सौत्वनः, जैत्वनः, from सामन्, वेमन्, सुत्वन् and जित्वन् ॥,
Adhyāya 6 · Pāda 4 · Rule 167
The syllable an of a aṅga (stem) ending in an remains unchanged before aṇ affix whether Patronymic or otherwise.,
As सामानः, वैमनः, सौत्वनः, जैत्वनः, from सामन्, वेमन्, सुत्वन् and जित्वन् ॥,