in addition to kievan rus the name "boris" went over to other neighbours of bulgaria as well. an example of this is the case of the hungarian prince boris kalamanos (1112–1155), son of the magyar king from his marriage with euphtimia, daughter of the kievan prince vladimir ii monomakh. for a fairly long period men named boris were found predominantly in the courts and among the nobility, but eventually the name became popular among all strata in the russian empire, including siberia and alaska. eventually the name spread internationally within the last 50–75 years.