Henessey is an uncommon given name of American origin, derived from French roots. It translates to "from the Hennessy estate," referring to a family that once resided near the town of Hennezel in northeastern France. The name gained popularity in the United States during the 20th century, with its peak usage being between the 1960s and 1970s. Today, it is still considered somewhat unconventional, but it carries a distinctive charm that sets it apart from more common names.
"The name Hennessy had a brief spike in popularity between 2002 and 2003, with five babies named in both years. After a gap of several years, it resurged again in 2010 with another six Hennessys born that year."