▁who ▁was ▁present ▁at ▁the ▁Sie ge ▁of ▁Rou en ▁in ▁ 1 4 1 8 – 1 9 . ▁He ▁ ▁had ▁previously ▁ ▁fought ▁in ▁the ▁s angu inary ▁conflict ▁known ▁as ▁the ▁Battle ▁of ▁Blo ody ▁Bank ▁near ▁Dublin ▁in ▁ 1 4 0 2 . ▁ ▁Family ▁ ▁He ▁was ▁the ▁son ▁of ▁James ▁Butler , ▁ 3 rd ▁Earl ▁of ▁Or mond , ▁by ▁an ▁unknown ▁ ▁mist ress ; ▁he ▁was ▁not , ▁as ▁is ▁sometimes ▁said , ▁the ▁son ▁of ▁the ▁Earl ' s ▁first ▁wife ▁Anne ▁W elles . ▁His ▁date ▁of ▁birth ▁is ▁uncertain , ▁but ▁since ▁he ▁saw ▁combat ▁in ▁ 1 4 0 2 , ▁was ▁Lord ▁Deput y ▁of ▁Ireland ▁in ▁ 1 4 0 6 ▁and ▁Prior ▁of ▁Kil main ham ▁by ▁ 1 4 1 0 , ▁it ▁must ▁have ▁been ▁long ▁ ▁before ▁his ▁first ▁legit imate ▁brother ▁was ▁born ▁in ▁ 1 3 9 2 , ▁and ▁ ▁before ▁his ▁father ' s ▁first ▁marriage ▁in ▁ 1 3 8 6 . ▁Thomas ' ▁nick name ▁ ▁Bac ach , ▁" the ▁l ame " ▁indicates ▁that ▁he ▁was ▁cri pp led , ▁but ▁this ▁dis ability ▁ ▁did ▁not ▁stop ▁him ▁from ▁purs uing ▁a ▁highly ▁successful ▁military ▁career . ▁ ▁It ▁is ▁said ▁that ▁he ▁had ▁a ▁son ▁named ▁John ▁Be agh ▁Bot iller , ▁who ▁was ▁born ▁before ▁ 1 4 2 0 ▁and ▁died ▁in ▁Kil ken ny , ▁County ▁Kil ken ny