Jan Łaski

Jan Łaski or Johannes Alasco (1499 – 8 January 1560) was a Polish Reformed reformer. Owing to his influential work in England (c. 1543–1555) during the English Reformation, he is known to the English-speaking world by the Anglicised forms John Laski and John a Lasco .

Jan Łaski was born in Łask, the son of Jaroslaw Łaski, the voivode of Sieradz Voivodship, and Susanna Bąk, the daughter of Zbigniew Bąk of Bąkowa Góra. His uncle, also Jan Łaski, was by turns royal secretary, Archbishop of Gniezno, Primate of Poland and Grand Chancellor of the Crown; he was also the uncle of King Sigismund I the Old. Both Jan Łaskis' coat-of-arms was Korab.

After his family's fall from political power and prestige, Łaski, a learned priest, went in 1523 to Basel, where he became a close friend of Erasmus and Zwingli. In 1542, he became pastor of a Protestant church at Emden, East Frisia. Shortly after, he went to England, where in 1550 he was superintendent of the Strangers' Church of London and had some influence on ecclesiastical affairs in the reign of Edward VI.

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