In French, name Lyn means – Variant of Lynette: Variant of Eluned: Idol. This form emerged in Tennysons story of Sir Gareth and Lynette, in one of his Idylls of the King(1859).. Other origins for name Lyn include – French, New-Zealand, German, Welsh, Spanish, English. Name Lyn is most often used as a girl name or female name.