Hi, this will show how vague an answer can be but I think Parnell was some sort of Irish political hero it would depend on your Parnell's dob it the parents named him after the hero or if it was a family name. I have seen the name Kenney in Galway/Roscommon area could be other places also. ( There may or may not be Kennys in my family they were from the Creagh area of Galway.(I have two set of family records one the mother is an O'Neil the other the mother is a Kenny. Family trad had O'Neil but the children of Kenny match the known siblings of our family. No wonder I am confused). Best wishes,Ann