Laks are Northern most Lurs they are ethnically a sub group of Kurds, Lur means Highlander it is an ancient word given to all people of the Zagros(Kurds,Laks, bakhtiaris) this word became an ethnic term later on to describe both Bakhtiaris and Laks by other groups, the sassanians used the term Kurd to describe all nomadic people(modern day Kurds,Laks,Bakhtiaris) so it explains the confusion of Lurs because they were given diffrent names at diffrent times Modern day people of Lurestan and Ilam either say they are Lur,Lak or and Ethnic Kurd depending on who you speak too