League

Chamber's Etymological of the English Language · 1895 · p. 296

leg, n. a distance of about three English miles, but varying greatly in different countries. —A Sea-league contains 3^ Eng. miles nearly. (Fr hcue—L. leuca, a Gallic, mile of 1500 Homan pacLs from the Celt., as in ret. leo, Gael, leig, a league.