The Genealogy Magazine of New Jersey has been published by the Genealogical Society of New Jersey since 1925. The September 1997 edition contained an interesting article, Essex County Gravestones— Some Tombstone Inscriptions with Irish Places of Birth in Roman Catholic Cemeteries.
Essex county is mostly urbanized, near New York City, and in the north east of New Jersey. Many Irish immigrants arrived in New York and went to Newark—the biggest city in the state—and other parts of New Jersey.
New Jersey Counties courtesy of Essex county Rootsweb page
While this article might be of use to some readers, another article in the same publication, “John Hugg Sr. was Not an Irishman” [italics added by article author] definitely will not!
 Curley, Augustine J. 1997. Essex County Gravestones—Some Tombstone Inscriptions with Irish Places of Birth in Roman Catholic Cemeteries in Genealogy Magazine of New Jersey. Vol. 72. No. 3. pp. 105-108
 Rubicam, Milton. 1965. John Hugg Sr. was Not an Irishman in Genealogy Magazine of New Jersey. Vol. 40. No. 3. pp. 97-99.