Lyn is a unisex name of Anglo-Saxon, English, French, German, Spanish and Welsh origin. Meaning in Anglo-Saxon: Dwells by the torrent. Meaning in English: Waterfall. Meaning in French: Variant of Eluned: Idol. This form emerged in Tennyson’s story of Sir Gareth and Lynette, in one of his Idylls of the King'(1859). Meaning in German: Snake. Lime tree; linden tree. Can also be a diminutive of any name ending in -linda. Meaning in Spanish: Pretty. Meaning in Welsh: Leader. Lion-like. Lyn is a variant of Lynette, variant of Linda and short form of Llewellyn. The name has 3 letters.