What is the meaning of Luter?

One who uses lute (the material).

A musician who plays a lute.

liquid

indefinite plural of lut

a hand-basin, laver

a washing- or bathing-tub

a baptismal font

medieval spelling of lutra

ne'er-do-well; deviant (one who does not follow social norms or behave fairly)

Source: wiktionary.org