Сигизмунд Кейстутович
The battle is also known as the Battle of Wilkomierz, Vilkomir or Ukmergė after Ukmergė/Vilkmergė, the nearest large settlement. It is also known as Battle of Šventoji after the Šventoji River that flows near the battle site. In Lithuanian, the battle is known as the Battle of Pabaiskas. The word "pabaiskas" is derived from Polish "pobojowisko" literally meaning "battle site". It came into use as a name for the town of Pabaiskas which grew around the Church of the Holy Trinity built at the site in 1436–40 by Sigismund Kęstutaitis.