Bystrík was probably of Slavic or Hungarian origin. The exact place and time of birth of St. Bystrík is unknown, however he seems to have come from aristocratic family who had been Christianised in the mission of Cyril and Methodius before the end of the Great Moravian Empire in 907 AD.
Bystrík's ancestry is believed to be Slavic or Hungarian, his origins are shrouded in mystery, and he was likely from an aristocratic family that embraced Christianity under the influence of Cyril and Methodius before the fall of the Great Moravian Empire in 907 AD.