Konstantin was the king of one of the last autonomous kingdoms of the Rus before the christians came. A Ventrue Sanctified namedPasko Grechkovik had been an early supporter of the advances and blamed the Circle of the Crone for the setbacks. A local cult of Baba Yaga-worshippers then tried to induct Konstantin into their ranks in1218, but he refused, resulting in a curse from the high priestess to remain sterile until blessed by the Crone. Later, Konstantin was embraced by a Nosferatu and pledged himself to the Circle when the learned of the effects of the curse.

The bloodline's members are almost all members of the Circle of the Crone. In the current nights, the Boyars have taken up the role given them by the Circle of the Crone with a fervor: that of fighting to reclaim the covenant’s lost glory, and they do so through political and economic means. No longer content to simply accept the discrimination and persecution heaped upon them by the Lancea Sanctum, the Yagnatia have taken the fight to their enemies. To this end, the bloodline has seized the reins and is making a name for itself as an undead leader in local and global economies.