Looking for Irish relatives

You don't have any dates for the family

Here are the McEvillys (Ballintober is near Castlebar) listed in the Tithe Applotments 1823-1837

http://titheapplotmentbooks.nationalarchives.ie/search/tab/results.jsp?…

McEvilly's in Mayo on Griffiths Valuations 1850's

http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNam…

This is a great site because you can search the maps to locate the town/village of origin.

You could search parishes like Aglish (Castlebar),.Touaghty (Ballintubber), Ballyhean, (these are all near Castlebar).  -Kilgeever is in Westport, which is 14kms away, so probably not your family)

McEvillys in Mayo in 1901 Census (you can search 1911 census too)

http://www.census.nationalarchives.ie/search/results.jsp?census_year=19…

McEvillys on Irish Graveyards.ie: (here you could check, Carnacon, Breaffy, and Ballintubber.)

http://www.irishgraveyards.ie/search.php?yardid=0&lastname=McEvilly&fir…

Mayo Cemeteries

http://freepages.genealogy.rootsweb.ancestry.com/~deesegenes/cem.html

Castlebar has its own website, you could post a query on the Roots or Nostalgia Forum

http://www.castlebar.ie/

Best of Luck with your research