Hin: अशोकनगर ashokanagar

‘Ashok Town’  [Pachhar]  Town/District, Madhya Pradesh (MP)

From (Emperor) Ashoka; and Hin: nagar,city’, ‘town’.

The suggestion that the name derives from an overnight visit from the  famous Mauryan Emperor en route to capture Ujjain  is popular and there is nothing else to go on.

For related place names see Indian Place names and Madhya Pradesh place names.