against Andrzej Nasiłowski (1474), Maciej Sawicki (1482), and pledged some of his land in Kobylany to Jan Smoniewski (1484). In conjunction, nephews of Jan Skwierczyński: Bujno, Jan, Wojciech, Paweł are also mentioned. The judicial book of Drohiczyn for 1456–1595 includes entries about: Wawrzyniec of Skwierczyn (1456), Paweł of Skwierczyn, who pledged half of his heritage to Wit and Stanisław of Orlice in 1458, and later that year was a witness for the Wąż family. Also in 1458 the widow of Jakub of Kobylany sued Mikołaj of Skwierczyn for killing her husband but failed to bring witnesses and subsequently lost the court case. In 1485 Bartosz of Skwierczyn deferred the hearing with Bartosz and Klemens Wilk upon the request of Mikołaj Kobyleński. In 1485 brothers Bujno, Wojciech, Paweł and Jan Skwierczyński pledged 18 hectares in Kobylany to Jan Smoniewski, when Wilk Skwierczyński and Klemens Olędzki paid Mikołaj Kobyleński for their absence in court hearing . In the same year Jan Skwierczyński pledged a field to Wojciech Skorupka. 'Księga grodzka drohicka, s.II, nr 1 (1473–1484)’ – a judicial book – also includes numerous entries about the Skwierczyński family of Skwierczyn. Towards end of 15th century Marcin Wąsowski took ownership of the majority of Skwierczyn Ruski. In 1528 the Skwierczyński family of Skwierczyn provided two knights with horses for the pospolite ruszenie (common movement) in Drohiczyn. Almost complete registers of the Skwierczyn Lacki village dating back to the Pospolite ruszenie register of 1567 have been preserved as well as in the register of the pledge of allegiance to the Kingdom of Poland (1569), in which we can find numerous representatives of the Skwierczyński family of the 16th century. The Union of Lublin joined Podlaskie to the Kingdom of Poland, whereas the szlachta (nobles) (who until then served the Grand Duchy of Lithuania despite being of mostly Polish-Masovian roots) pledged their allegiance to the Kingdom of Poland. The szlachta (nobles) of Drohiczyn were pledging their allegiance on 14 May 1569. Skwierczyn was represented by szlachta (nobles): Stanisław son of Wojciech, Jan son of Tomasz, Mikołaj, Jan, Maciej sons of Szczęsny, as well as 2 others whose names are unknown. Skwirczyn Lacki was represented by szlachta/heirs: Malcher son of Mikołaj, Maciej, Mikołaj sons of Wojciech, Maciej, Bartłomiej sons of Paweł, Florian son of Walenty, Maciej, Paweł, Wojciech sons of Jan, Stanisław son of Andrzej, Stanisław son of Piotr, Aleksy son of Paweł, Antoni son of