a. (sb.) [f. LETT + -ISH.] Pertaining to the Letts or their language. Also absol. as sb., the language of the Letts.
1831. For. Q. Rev., VIII. 63. One of the most important personages of the ancient Lettish mythology.
1841. Latham, Eng. Lang., 3. The Livonian (or Lettish) of Livonia and of Courland.
1842. Prichard, Nat. Hist. Man, 183. These dialects are the Lettish, Lithuanian, and the Proper Pruthenian.
1881. Freeman, Hist. Geog. Eur., I. xi. 466, note. Lett, with the adjective Lettish, is the special name of one of the obscurer members of the family.
1888. King & Cookson, Sound & Inflex., ii. 34. The Baltic family contains the three divisions of Old Prussian, Lithuanian, and Lettish.