Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Lankānagara
Lankānagara,Lankāpura:One of the chief cities of the Yakkhas in Ceylon.Polamittā,wife of Mahākālasena,the chief Yakkha of Ceylon,was a princess of Lankāpura (Mhv.vii.33; MT.260).Kuvenī herself was evidently from Lankāpura,because it was there she went when she was abandoned by Vijaya. Mhv.vii.62; MT.265.