Unfortunately I don't care for any of them and I definitely wouldn't have guessed that a name spelled
Lleucu was pronounced anything like the options listed.
Loo-kee sounds WAAAAAAY to close to "loogie."
Ligh-kee makes me think of the movie
Tommy Boy when
Chris Farley said, "
Tommy LIKEY...Tommy want wingie."
Lay-kee sounds like baby talk referring to a "lake." That's just my opinion.