, ▁the ▁fifth ▁Mar qu ess ▁( who ▁was ▁a ide - de - camp ▁to ▁Lieutenant ▁General ▁Sir ▁John ▁Gren f ell ▁Max well ▁during ▁World ▁War ▁I , ▁and ▁who ▁died ▁on ▁November ▁ 9 , ▁ 1 9 1 8 ▁in ▁York ), ▁and ▁Frederick , ▁the ▁sixth ▁Mar qu ess , ▁both ▁succeeded ▁in ▁the ▁titles . ▁Frederick ' s ▁son , ▁Frederick , ▁succeeded ▁him ▁in ▁ 1 9 7 4 ▁as ▁sevent h ▁Mar qu ess , ▁followed ▁by ▁his ▁son ▁Henry , ▁the ▁e ighth ▁Mar qu ess , ▁in ▁ 2 0 0 9 . ▁ ▁Several ▁other ▁members ▁of ▁the ▁Con y ng ham ▁and ▁Bur ton ▁families ▁may ▁also ▁be ▁mentioned . ▁Henry ▁Con y ng ham ▁( d ied ▁ 1 7 0 6 ), ▁father ▁of ▁the ▁first ▁Earl ▁Con y ng ham ▁( of ▁the ▁ 1 7 1 8 ▁creation ), ▁was ▁a ▁Major - General ▁in ▁the ▁British ▁Army ▁and ▁was ▁killed ▁in ▁the ▁War ▁of ▁the ▁Spanish ▁Su cc ession . ▁Francis ▁Bur ton ▁( d ied ▁ 1 7 4 3 ), ▁father ▁of ▁the ▁second ▁Baron ▁Con y ng ham , ▁was ▁a ▁Member ▁of ▁the ▁Irish ▁Parliament ▁for ▁Col era ine ▁and ▁County ▁Cla re . ▁William ▁Con y ng ham ▁( who ▁assumed ▁the ▁surname ▁of ▁Con y ng ham ▁in ▁lieu ▁of ▁Bur ton ▁in ▁ 1 7 8 1 ), ▁younger ▁son ▁of ▁Francis ▁Bur ton ▁and ▁younger ▁brother ▁of ▁the