borough ▁in ▁the ▁House ▁of ▁Commons . ▁In ▁April ▁ 1 7 4 2 ▁he ▁was ▁created ▁Lord ▁Fitz will iam , ▁Baron ▁of ▁Mil ton ▁in ▁the ▁County ▁of ▁North am pton , ▁in ▁the ▁Pe er age ▁of ▁Great ▁Britain , ▁and ▁in ▁ 1 7 4 6 ▁he ▁was ▁further ▁hon oured ▁when ▁he ▁was ▁made ▁Earl ▁Fitz will iam , ▁of ▁Nor borough ▁with ▁the ▁subs idi ary ▁title ▁Vis count ▁Mil ton , ▁both ▁in ▁the ▁County ▁of ▁North am pton , ▁also ▁in ▁the ▁Pe er age ▁of ▁Great ▁Britain . ▁Lord ▁Fitz will iam ▁married ▁Lady ▁Anne ▁Watson - W ent worth ▁( d ied ▁ 1 7 6 9 ), ▁daughter ▁of ▁Thomas ▁Watson - W ent worth , ▁ 1 st ▁Mar qu ess ▁of ▁Rock ingham , ▁and ▁sister ▁of ▁Charles ▁Watson - W ent worth , ▁ 2 nd ▁Mar qu ess ▁of ▁Rock ingham . ▁He ▁was ▁succeeded ▁by ▁his ▁son , ▁the ▁fourth ▁Earl . ▁ ▁The ▁fourth ▁Earl , ▁William ▁Fitz will iam , ▁was ▁a ▁prominent ▁Wh ig ▁politician ▁and ▁served ▁as ▁Lord ▁President ▁of ▁the ▁Council ▁and ▁as ▁Lord - L ie utenant ▁of ▁Ireland . ▁In ▁ 1 7 8 2 ▁he ▁inherited ▁the ▁Watson - W ent worth ▁est ates ▁( including ▁W ent worth ▁Wood house ) ▁on ▁the ▁death ▁of ▁his ▁uncle ▁Lord ▁Rock ingham , ▁which ▁made ▁him ▁one ▁of ▁the ▁greatest ▁land own ers ▁in ▁the ▁country . ▁When ▁he ▁died