And earlier would be the Luxembourgers that left for Romania. https://en.wikipedia.org/wiki/Transylvanian_Saxons
The first ancestors of the Transylvanian 'Saxons' originally stemmed from Flanders, Hainaut, Brabant, Liège, Zeeland, Moselle, Lorraine, and Luxembourg,
And earlier would be the Luxembourgers that left for Romania. https://en.wikipedia.org/wiki/Transylvanian_Saxons