Chapelizod

hello i am trying to trace my family background i have been told that my fathers parents or my grandfathers name was lawrence who had 3 brothers who all wanted to join the fight in the first world war  only 3 were allowed to go as 1 had to stay to help with  the buisnes there is some mention of the wrens nest who was owned by a hugie ennis  i dont know the relation ship of hugie to my grandfather but  lawrence stayed home to run a buisness and only one  brother  came back two died out there the one that came back supposed to be shell shocked was outcast and ended up homelesss on the streets thats as much as i know  i dont know all the brother names thanks