अन्

Operational rule vidhi

The syllable अन् of a अङ्ग (stem) ending in अन् remains unchanged before अण् affix whether Patronymic or otherwise.

Word by word (padaccheda)

Substitute / term अन् prathamā · ekavacana

Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

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Full reading

अन्

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The syllable अन् of a अङ्ग (stem) ending in अन् remains unchanged before अण् affix whether Patronymic or otherwise.
As सामानः, वैमनः, सौत्वनः, जैत्वनः, from सामन्, वेमन्, सुत्वन् and जित्वन् ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.