"turf, stretch of grass," 1540s, laune "glade, open space between woods," from Middle English launde (c.1300), from Old French lande "heath, moor, barren land; clearing" (12c.), from Gaulish (cf. Breton lann "heath"), or from its Germanic cognate, source of English land (n.). The -d perhaps mistaken for an affix and dropped. Sense of "grassy ground kept mowed" first recorded 1733.
"thin linen or cotton cloth," early 15c., probably from Laon, city in northern France, a center of linen manufacture. The town name is Old French Lan, from Latin Laudunum, of Celtic origin.