Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.igp-web.com/IGPArchives/ire/meath/misc/surnames-mea.txt
Description:
Barnwall, Baron,
Bathe, De,
Butler, Baron,
Dillon,
Dowdall,
Fitz-Eustace, Baron,
Chevers,
Cruise,
Fitzgerald (or Fitzgibbon),
Cusack (O'Cisoghe)
The White Knight,
Dalton, Baron,
Darcy,
Dardis,
Fleming, Baron,
Geneville, De, Lord,
Lacey, De,