The name 'Kissum' with varied spelling does not appear as a
surname on the Irish census (all counties) or on other varied
Irish research sites. Could the surname possibly be 'Crisham/
Cresham/Crishum? Because of the 'brogue' Irish accent, many
names were mis-interpreted by emmigrant officials. If you have access to the Ancestry.com shipping papers, you could possibly find your Bridget/Delia listed, and it may give her
homeplace depending on what year she emmigrated.