http://www.cooganresearchgroup.com/crg/index.htm 22 December 2013 COOGANs listed in 1911 [Northern] Ireland Census - County Londonderry [County Derry]: ***Note - not a complete listing*** Coogan, Mary - age 42 - born ? Townparks, ?, Londonderry NAI ITEM ?, DED Magherafelt Coogan, Sarah - age 14 - born ? ***living with ? Tirgan, ?, Londonderry NAI ITEM ?, DED Brackagh Slieve Gallion