 The family died out in the 16th century.The surname Kęsgaila comes from the native first name of Mykolas Kęsgaila (son of Valimantas, son of Bushka) whose elder brother Jaunutis son of Valimantas was granted the Zadora coat of arms in the Union of Horodło of 1413.In line with the common practice for nobles' names after the Christianization of Lithuania, after his baptism, the Christian name "*Mīkālas" (Michael) was added to a pagan Lithuanian name, which can be reconstructed as *"Kensgaĭla" (from "kęsti" ("be patient") and "gailas" ("strong")).