Miscellaneous: OFFALY Surnames found in Kings Co 1100 thru 1600.
Ireland Genealogy Projects Archives
http://www.igp-web.com/IGPArchives/copyright.htm
http://www.igp-web.com/IGPArchives/offaly/ 
Transcribed and contributed by Don Kelly 
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Cogan, De, Lord,                 
Baron,    
Fitzgerald,                    
Fitzsimon,                     
Hussey,                
Lacey, De,                  
O'Bannan, Chief,            
O'Callaghan, Viscount,                 
O'Behan, Chief,             
O'Bergin,                   
O'Carroll, Prince,             
O'Conor, Prince,        
O'Dorrian,                      
O'Hennessey, Chief,     
O'Hoollaghan,           
O'Malaghlin, King,      
O'Molloy, Prince,       
O'Mooney, Chief,         
O'Madden, Chief,       
O'Mulvany,             
O'Muready, Chief,      
Warren,