A transposed varient spelling of Cornish origin but derived from the Olde Gaelic Glen, Glynn or Glinn, meaning 'a small valley'. The name in the plural means 'The son of Glin'. The present spelling being as a result of 17th century dialectual corruptions, common in these early names. The Coat of Arms of the original Glynn of St Mawgan in Menege, North Cornwall, was Silver, a black two headed eagle, within a border. The first recorded spelling of the family name is shown to be that of Morgan Glin which was dated 1679, The Militia Rolls of Barbados during the reign of King Charles II, The Merry Monach, 1660 - 1685 Surnames became necessary when governments introduced personal taxation. In England this was known as Poll Tax. Throughout the centuries, surnames in every country have continued to "develop" often leading to astonishing variants of the original spelling.