I have an ebook available for download on the Comber history Society website see
http://www.comberhistory.com/index.htm#alpha1 see the siubject index near the bottom of the page it contains these entries for mcKenna BUT I stopped work on it about 2008
McKenna, Isabella , Miss. Comber Wife of William John Turkington; Mother of Margaret B. 1865 CR . , freepages.genealogy.rootsweb.ancestry.com/~rosdavies/
McKenna, James, Comber of MoneyreaghA Farmer; Will Probated 8 Sep 1856 IIW #45316, freepages.genealogy.rootsweb.ancestry.com/~rosdavies/
McKenna, Mary, Miss. Comber of MoneyreaghB. Abt. 1838; Married William Kennedy 6 May 1858 In MoneyreaghMother of Robert B. 1859 & James B. Abt. 1863 & Robina B. Abt. 1875 RAJ G8/71, freepages.genealogy.rootsweb.ancestry.com/~rosdavies/
McKenna, Samuel, Moneyrea D/654/A3/1N Freeholder in
www.proni.gov.uk McKenna, Samuel, Moneyrea D/654/A3/1S Freeholder in
www.proni.gov.uk