▁his ▁father ▁in ▁ 2 0 1 3 . ▁ ▁The ▁Hon ou rable ▁Sir ▁Alg ern on ▁Bo yle , ▁sixth ▁son ▁of ▁the ▁fifth ▁Earl , ▁was ▁an ▁adm iral ▁in ▁the ▁Royal ▁Navy . ▁ ▁The ▁family ▁seat ▁was ▁Castle ▁Mart yr ▁( or ▁Cast lem art yr ) ▁in ▁Cast lem art yr , ▁County ▁C ork , ▁which ▁was ▁the ▁ancient ▁seat ▁of ▁the ▁Fitz G er ald s . ▁ ▁Ear ls ▁of ▁Sh annon ▁( 1 7 5 6 ) ▁Henry ▁Bo yle , ▁ 1 st ▁Earl ▁of ▁Sh annon ▁( 1 6 8 6 – 1 7 6 4 ) ▁Richard ▁Bo yle , ▁ 2 nd ▁Earl ▁of ▁Sh annon ▁( 1 7 2 8 – 1 8 0 7 ) ▁Henry ▁Bo yle , ▁ 3 rd ▁Earl ▁of ▁Sh annon ▁( 1 7 7 1 – 1 8 4 2 ) ▁Richard ▁Bo yle , ▁ 4 th ▁Earl ▁of ▁Sh annon ▁( 1 8 0 9 – 1 8 6 8 ) ▁Henry ▁B entin ck ▁Bo yle , ▁ 5 th ▁Earl ▁of ▁Sh annon ▁( 1 8 3 3 – 1 8 9 0 ) ▁Richard ▁Henry ▁Bo yle , ▁ 6 th ▁Earl ▁of ▁Sh annon ▁( 1 8 6 0 – 1 9 0 6 ) ▁Richard ▁Bernard ▁Bo yle , ▁ 7 th ▁Earl ▁of ▁Sh annon ▁( 1 8 9 7 – 1 9 1 7 ) ▁Robert ▁Henry ▁Bo yle , ▁ 8