Konstantinas Sirvydas, Lithuanian priest, lexicographer, and academic (b. 1579)
Konstantinas Sirvydas (rarely referred as Konstantinas Širvydas; Latin: Constantinus Szyrwid; Polish: Konstanty Szyrwid; c. 1579 – 8 August 1631) was a Lithuanian religious preacher, lexicographer and one of the pioneers of Lithuanian literature from the Grand Duchy of Lithuania, at the time a confederal part of the Polish–Lithuanian Commonwealth. He was a Jesuit priest, a professor at the Academia Vilnensis and the author of, among other works, the first grammar of the Lithuanian language and the first tri-lingual dictionary in Lithuanian, Latin and Polish (1619). Famous for his eloquence, Sirvydas spent 10 years of his life preaching sermons at St. Johns' Church in Vilnius (twice a day – once in Lithuanian and once in Polish).