The cities of the Deep Ones have no names that men can speak, so Dany merely numbered them one though five in the order she would like to see them destroyed. They are split roughly in half between the Shivering Sea to the north and the Summer Sea to the south.
The three cities of the north lie as follows:
Two-hundred leagues north-east of Ib where the Aboleth Chronomancers struggle over ages, or perhaps instants, to pry apart the laws of time and space. One-hundred-and-ten leagues east of Skagos where the legions of Sahuagin and toiling hoards of Skum are birthed, given tools and weapons that they may serve their masters. Finally among the Thousand Islands black spires dot the tainted waters still trying to wring some use from failed experiments, though there are hints that they may be searching for something more, something greater, almost fearfully, if such horrors can be said to know fear.
In the south one city lies close to the Isle of Toads where foolish mortal sorcerers still commune with the deep horrors in secretive arcane rites that, to the Deep Ones' disdain, require mortal aid of some sort. The final city lies in the shallows between the Manticore Isles from whence emissaries and spies are sent to Leng and Asshai by the Shadow.