Jill Hennessy is a proper noun—typically treated as two words—used to identify a specific person. It is spoken with two stressed syllables, reflecting the name structure: JILL (short 'i') and HEN-NES-SY (stress on HEN). In typical English, it functions as a name in reference, rarely as a verb unless used idiosyncratically; the main focus here is pronunciation guidance for the name itself rather than verb usage.
Full pronunciation guide
