Banko/Banco Banagher, Reynagh, Birr - Australia

I am researching my ancestors, Banko family originally from Eyrecourt, but later generations from Banagher and Birr.

Is there any record of them in the 1881 census of Kings? Not sure which area these places fall under.

Any ideasabout how to trace the Banko origins before Eyrecourt in late 17th century, would also be appreciated.

Many thanks,

Roisin.