Note:  Do not rely on this information. It is very old.

Jagellons

Jagellons, an illustrious dynasty which reigned in Lithuania, Poland, Bohemia, and Hungary, descended from Jagello, who succeeded to the grand-duchy of Lithuania in 1381, and, on the death of his father-in-law Lewis the Great, became king of Poland after being converted to Christianity under the name Ladislaus II. Six of his family reigned in succession, the last, Sigismund Augustus, dying in 1572, but his line was continued through a sister of the last king until 1668. The younger branch reigned in Hungary and Bohemia till Lewis II. was killed (1526) by the Turks.

Click for more about Sigismund