Some suggestions:
Battletown, Wexford
Batterstown, Meath
Bottomstown, Knockainy, Limerick
Bohernore/Bohermore, Knocklong, Limerick (not an official townland, but an area of the town)
and Derrybrock - there's one in Queen's County (Laois) and one in Mayo.
There's a birth of a Michael Duggan, with father Michael, in the RC parish of Knocklong in 1839, which fits with the 1861 census entry above.
Nothing conclusive there though.