My 2nd great grandfather John Healey (b. 1830 Listowel, Ireland) originally had the Healy family name. He appears to have changed it to Healey (the English variant)when he escaped the famine and made his way to London in 1850's. He had a daughter Margaret (b. 1854, London)and emigrated to Australia in 1855 where he was a New South Wales Policeman. His daughter Margaret married WIlliam Tennant Moss and they remained in NSW, so no help for you there.