Meaning

originOriginally dialectal, from Old French liois (“compact limestone”) (French liais), from Medieval Latin liae, plural of lia; doublet of lees (which is via Latin lias). Ultimate origin uncertain, possibly a Celtic word (such as Gaulish *ligyā) from Proto-Celtic *legyā, from Proto-Indo-European *legʰ- (“to lie (down)”). Compare Loire and Leicester.

Etymology from Wiktionary, CC BY-SA 3.0