There's an entire map full of cool place names begging you to customize them. Lyrabar, a port city with a seedy criminal underbelly? Boring. Lyrabar, the city in the sky, held in place by chains forged in an alliance between the dwarves and the giants? Now we're talking
That depends. Lyrabar, the port city with a seedy criminal underbelly is at the southernmost point of Impiltur, on the northern shore of the Sea of Fallen Stars.
The Flying City Lyrabar and its counterpart the Sunken City exist only in my campaign's Faerûn
Ah. I see. I think I understand the notion, but if an approach to a map is changing it along with its respective lore, then I prefer just making my own cities alltogether. It's part of the realms lore that not everything is a gigantic floating city. There are those of Netheril if you want some.