Heffernan

== English == === Etymology === Anglicized form of Irish Ó hIfearnáin (“descendant of Ifearnán”), a personal name derived from a diminutive form of ifreannach (“demon”), from ifreann (“hell”). === Proper noun === Heffernan (plural Heffernans) A surname from Irish. ==== Statistics ==== According to the 2010 United States Census, Heffernan is the 5043rd most common surname in the United States, belonging to 6961 individuals. Heffernan is most common among White (94.34%) individuals. === Further reading === Hanks, Patrick, editor (2003), “Heffernan”, in Dictionary of American Family Names, volume 2, New York: Oxford University Press, →ISBN, page 152.