: I think it is not. This term (same sound as in Russian - "lech") is used also in Czech and Polish language. Its very old word for Poles, older than migration of Vlachs from Balkan to this part of Europe. It is used in various myths about Slavic roots (ie. about forefather Czech and his brother Lech, forefather of Poles) Lech%2C_founder_of_Poland Lechia