▁ 9 th ▁Earl ▁of ▁E gl inton ▁( c . 1 6 6 0 - 1 7 2 9 ). ▁ ▁Personal ▁life ▁In ▁ 1 7 1 9 , ▁he ▁married ▁Lady ▁Anne ▁Keith , ▁the ▁young est ▁daughter ▁of ▁the ▁ 9 th ▁Earl ▁Mar isch al ▁and ▁they ▁had ▁three ▁children : ▁Alexander , ▁died ▁un mar ried ▁John , ▁died ▁young ▁Lady ▁Mary ▁Stewart ▁( d . ▁ 1 7 5 1 ), ▁who ▁married ▁Kenneth ▁Mack en zie , ▁Lord ▁Fort rose ▁ ▁Lady ▁Anne ▁died ▁in ▁ 1 7 2 8 ▁and ▁Alexander ▁married ▁Lady ▁Catherine ▁C och rane , ▁the ▁young est ▁daughter ▁of ▁John ▁C och rane , ▁ 4 th ▁Earl ▁of ▁D und on ald , ▁in ▁ 1 7 2 9 . ▁They ▁had ▁eight ▁surv iving ▁children : ▁▁ ▁John ▁Stewart , ▁ 7 th ▁Earl ▁of ▁Gall ow ay ▁( 1 7 3 6 – 1 8 0 6 ) ▁ ▁George ▁( d . ▁ 1 7 5 8 ) ▁ ▁Admir al ▁Keith ▁Stewart ▁of ▁G lass erton ▁( 1 7 3 9 – 1 7 9 5 ) ▁ ▁Catherine ▁Stewart ▁( c . ▁ 1 7 5 0 – ?) ▁ ▁Lady ▁Sus anna ▁Stewart . ▁( d . ▁ 1 8 0 5 ) ▁She ▁married ▁Gran ville ▁Le ves on - G ower , ▁ 1 st ▁Mar qu ess ▁of ▁Staff ord . ▁ ▁Margaret ▁Stewart ▁( d . ▁ 1 7