As I said, they ARE in a Rennaissance setting already - at least most of them. You may also think of "Ermorishness" time as a period equivalen to real world Black Death - also right in the beginning of Rennaissance...
An idea of making "ancien regime" France out of Pangaea was quite good, too, I'd say - especially considering a fad for satir-nymph relationships and Amurs in Barocco period...
About continental connections - I'm not sure, but I feel that Dawn of Dominions map provides something like an "official location" for various nations in EA. Then, Marignon is formed in the region where Marverni was and Pythium in former Sauromatia lands (as indicated by hydras)... Of course, Man isn't present here but there are clear indications in background text that Tir-Nan-Og, Fomoria, Man and Eriu are the same archipelago...