There are indeed. In a book compiled and published by Ann Billings and her mother Dortha Sedgwick, the title being Cantwell and Allied Families of AR, AZ, NM, OK, and TX...there are names that come from Kilkenny, Ireland...the de Cantevilles.
Conteville is a later spelling of that family.
In the United States there were Cantrells and Cantwells. These two names in particular are the same family as siblings of a Cantrell just decided to start spelling their name Cantwell.