Akerovych, Petro [Akerovyč]. Metropolitan of Kyiv from 1241 to 1245, descendant of a boyar family. Akerovych participated in the Council of Lyons in 1245, where he informed the Catholic West of the Tatar threat. He was hegumen of the Transfiguration Monastery in the Berestove district of Kyiv (mentioned in texts as early as 1072) and was employed by Prince Mykhail Vsevolodovych of Chernihiv in diplomatic service. Nothing is known of Akerovych past the year 1245.
Encyclopedia of Ukraine