O`Brollachain Name.
There are two different spellings to this name,i found on different sites,so will add them both.
"Bradley"
An English and Scotish place name, from the Old English elements brad=broad+leah=wood,clearing.
Places called " broad clearing" or Bradley exist through out Scotland and england.
Occasionally, Bradley is derived as anglicized Irish version of the Gaelic patronymic name O Brolchain, which meant " desendant of Brolach."
veriations are Bradly,Bratly,Bratley,Broadely,Broadly.
The name Bradley in Ireland is derived from the Native Gaelic O` Brollachain sept that was located in Ulster Province and in County Cork.
  This sept also anglicized there name as O`Brallaghan. This was name was also brought to the county by settlers who arrived from england, especailly during the seventeenth Century.