1604, from Ir.
lupracan, metathesis from O.Ir.
luchorpan lit. "a very small body," from
lu "little" +
corpan, dim. of
corp "body," from L.
corpus "body" (see
corporeal). Commonly spelled
lubrican in 17c. Eng.
Leithbragan is Ir. folk etymology, from
leith "half" +
brog "brogue," because the spirit was "supposed to be always employed in making or mending a single shoe."