Christian of Stavelot, in Expositio in Matthaeum Evangelistam (864):
"At the present time we know of no nation under the heavens where Christians do not live. For [Christians are even found] in the lands of Gog and Magog -- who are a Hunnic race and are called Gazari (Khazars)... circumcized and observing all [the laws of] Judaism. The Bulgars, however, who are of the same seven tribes [as the Khazars], are now becoming baptized [into Christianity]."
http://www.khazaria.com/khazar-quotes.html
Christian of Stavelot, in Expositio in Matthaeum Evangelistam (864):
Are the Ukranians arresting Orthodox priests Christians or Khazarians?