ason ▁from ▁the ▁I cel and ic ▁S agas , ▁although ▁neither ▁were ▁recorded ▁as ▁coming ▁to ▁England . ▁ ▁The ▁large ▁number ▁of ▁villages ▁and ▁farm st ead s ▁containing ▁a ▁personal ▁name ▁and ▁- by ▁are ▁believed ▁to ▁have ▁been ▁settled ▁by ▁Sc and in av ian ▁conquer ors ▁breaking ▁up ▁the ▁English ▁church ▁and ▁sec ular ▁est ates ▁from ▁the ▁late ▁ 9 th ▁century . ▁There ▁are ▁high ▁density ▁po ckets ▁in ▁parts ▁of ▁York shire ▁corresponding ▁to ▁the ▁Nor se ▁Kingdom ▁of ▁J or vik ▁and ▁the ▁subsequent ▁Ang lo - Dan ish ▁Ear ld om ▁of ▁North umb ria ▁from ▁ 9 5 4 . ▁ ▁History ▁ ▁In ▁the ▁Dom es day ▁Book ▁of ▁ 1 0 8 6 , ▁B oul by ▁is ▁given ▁as ▁B ole bi ▁or ▁Bol le bi , ▁and ▁appears ▁within ▁the ▁so ke ▁of ▁Lo ft us , ▁held ▁in ▁the ▁William ▁the ▁Con quer or ’ s ▁time ▁by ▁High ▁d ' Av ranch es , ▁Earl ▁of ▁Ch ester . ▁It ▁states ▁" In ▁B ole bi , ▁Ch il u ert ▁had ▁ 1 ▁car uc ate ▁of ▁land , ▁sufficient ▁for ▁ 1 ▁pl ough , ▁val ued ▁at ▁ 8 ▁sh ill ings ." ▁Ch il u ert ▁held ▁the ▁man or ▁before ▁the ▁con quest . ▁Some ▁time ▁afterwards ▁B oul by , ▁along ▁with ▁E as ington , ▁passed ▁to ▁the ▁de ▁Br us ▁family , ▁L ords ▁of ▁Sk el ton