Skull Island-The Caribbean Monquista-Spain Valencia-Mainly Italy Cool Ranch-Central/Western America Mooshu-Japan and China Marleybone-Great Britian Albion-Scotland and Ireland Aquila-Ancient Greece Rajah-India Krokotopia-Ancient Middle East Polaris-France/Russia? El Dorado-Who knows?
As you are right about Rajah being India, I'd like to back that up. The Rajah Tigers allude to czars (I think). Czars did in fact aid Great Britain.