约盖拉（Jogaila），后称为瓦迪斯瓦夫二世·雅盖沃（Władysław II Jagiełło），1348年？－1434年6月1日），立陶宛大公和波兰国王。于1377年起统治立陶宛，其任期开始时，与他的叔父科斯图提斯共治。在1386年，他昄依天主教，取教名为瓦迪斯瓦夫，和年轻的波兰国王雅德维加结婚，加入龙骑士团，并以瓦迪斯瓦夫·雅盖沃的名义加冕为波兰国王，起初他和妻子共治波兰，妻子去世后他单独统治直到逝世。

他统治波兰共48年，实为后来统治波兰立陶宛两地长达几世纪的波兰立陶宛联邦的奠基人，并将其名字（Jagiełło）授予雅盖隆王朝（Jagiellonian dynasty），该王朝统治两国至1572年，为中世纪时期中东欧最有影响力王朝之一的格迪米尼兹王朝下的支系。

Jogaila, later Władysław II Jagiełło (Polish pronunciation: [vwadɨˈswaf jaˈgʲɛwwɔ]) (c. 1352/1362 – 1 June 1434) was Grand Duke of Lithuania (1377–1434), King of Poland (1386–1399) alongside his wife Jadwiga, and then sole King of Poland. He ruled in Lithuania from 1377. Born a pagan, in 1386 he converted to Catholicism and was baptized as Władysław in Kraków, married the young Queen Jadwiga, and was crowned King of Poland as Władysław II Jagiełło. In 1387 he converted Lithuania to Christianity. His own reign in Poland started in 1399, upon death of Queen Jadwiga, and lasted a further thirty-five years and laid the foundation for the centuries-long Polish–Lithuanian union. He was a member of the Jagiellonian dynasty in Poland that bears his name and was previously also known as the Geminid dynasty in the Grand Duchy of Lithuania. The dynasty ruled both states until 1572, and became one of the most influential dynasties in the late medieval and early modern Central and Eastern Europe. During his reign, the Polish-Lithuanian state was the largest state in the Christian world.