It would be nice to get an answer on this but I'm certain it will be left ambiguous.
This is a really similar scenario to the unnamed kingdom in Tahm Kench's lore that he takes the gambler too. The problem with Tahm Kench and Kindred is that they are ancient. So it not only begs the question of where does this story take place but when?
Jandelle and Needlebrook could be anywhere in Runeterra. They could also be from anytime in Runeterra.
For all we know those settlement could have later became Demacia in current king.