About the Hennessy surname
The etymology of Hennessy is left open in this synthesis rather than being inferred only from its modern form. The canonical form used here is “Hennessy”; phonetic or spelling differences found in indexes should be checked against the other information in the record. In genealogy, comparing successive spellings and the places where the family lived often provides more evidence than an isolated interpretation of the name.
Pronunciation:
È-nè-si/ɛnɛsi/