The Geographical Dictionary of Ancient and Mediaeval India c3.s1.5

c3.s1.5

(1) Final *a*, as the affixes Pura, Pur ; Nagara, Nagar ; Grâma, Grâm ; sometimes initial *a*, as Apâpa-puri, Pâpa.
(2) *i*, as Iriṇa, Raṇ or Runn of Cutch ; Irâvatî, Râvi ; Tâlikaṭa, Talkâḍa.
(3) *u*, as Uḍaṇḍapura, Daṇḍapura.
(4) *th*, as Mithilâ, Miyul.
(5) *n*, as Pratiṣṭhâna, Pratiṣṭhâ ; Kuntalapura, Kauttalakapura ; Kuṇḍagrâma, Koṭigâm ; Kaṇṭakadvîpa, Kâṭwâ ; Baruṇa, Bârâ ; Anamâ, Aumi.