http://www.cooganresearchgroup.com/crg/index.htm 22 December 2013 COOGANs listed in 1901 [Northern] Ireland Census - County Londonderry [County Derry]: ***Note - not a complete listing*** Coogan, Mary - age 30 [community members of religions] - born Ireland (County Dublin) Townparks, Magherafelt, Londonderry NAI ITEM ?, DED Magherafelt [Roman Catholic]