Bulan was the E-B405 Cozar descendant of Batbayan-Bezmer. He was converted to Judaism by Yitzhak Sangari in 740 and took the name Sabriel. Many of his men were buried in Chelarevo when the Moravians began to expand.

The Bulanid Jewish Kings of the Cozar people seceded in West Ukraine to become a completely independent nation under their own line of rulers from the non-Jewish Ashina Khazar Khagans of Taurian-Khazaria. The known lineage of Bulanid Khagans of the Cozar people in Halych is:

Sabriel c.740

Obadiah

Hezekiah

Manasseh I

Hanukkah,

the brother of Obadiah; next (814-?)

Isaac, his son; afterwards (?-835)

his son Zebulun

then his son Moses-Menasseh

then his son Nisi

then his son Aaron I

then his son Menahem

then his son Benjamin

then his son Aaron II

Joseph 950s-960s

Their descendant Khan-Tuvan Dyggvi eventually led his the Kouver-Cozars in secession as the Kiabar Jews of Kopyriv Kinets' who had split with the Kara-Khazars.

Others assisted in the restoration of Hungary before being hung out to dry.