Webster's Revised Unabridged Dictionary · 1913

Wallachian

Wallachian , adjective

[Also Walachian, Wallach, Wallack, Vlach, etc.]

Of or pertaining to Wallachia, a former principality, now part of the kingdom, of Roumania.
An inhabitant of Wallachia; also, the language of the Wallachians; Roumanian.