A luthier (/ˈluːtiər/ LOO-ti-ər)[1] is someone who builds or repairs string instruments generally consisting of a neck and a sound box. The word "luthier" comes from the French word luth, which means lute. A luthier was originally a maker of lutes, but the term now includes makers of stringed instruments such as the violin or classical guitar. A luthier does not make harps or pianos, as these require different skills and construction methods because their strings are secured to a frame.

see: https://en.wikipedia.org/wiki/Luthier