Īrā(Ira) is the name of a holy river mentioned in Vāyupurāṇa (Vayupurana). Probably the river Irāvatī (Iravati) is mentioned here in a short form, Īrā.

[See Irāvatī – 1 (Iravati – 1)]

Vāyupurāṇa(108.79)