Vlach 
(vlä)
(vlä)n.
A member of a people forming the principal ethnic group of Romania, also located in small populations in other parts of the Balkan Peninsula.
[From Bulgarian vlakh and Serbo-Croatian vlah, both ultimately from a Germanic term referring to Celts and by extension to Romanized and Latin-speaking peoples in general; akin to Old English Wealh, foreigner, Celt; see WELSH.]