Kotara (कोटर) is name of a Forest mentioned by Panini as Koṭarāvana (कोटरावन). 
Kotaravana कोटरावन) is name of a Forest mentioned by Panini in Ashtadhyayi under Kotaradi (कोटरादि) (6.3.117) group. 
Kotara is a village in Sarangarh (सारणगढ) tahsil of Raigarh district in Chhattisgarh.
Shalya Parva, Mahabharata/Book IX Chapter 45 provides the List of the mothers who became the companions when Skanda was installed. Kotara (कॊटरा) is mentioned in verse (IX.45.17).