Where does “Parnell” come from?

Parnell is an English variant of Petronella, from Latin Petronella, a feminine form derived from the Latin name Petronius.

Ancestry of “Parnell”, step by step

Step	Language	Word	Meaning
1	English	Petronella	—
2	Latin	Petronella	—
3	Latin	Petronius	of or pertaining to the gens Petronia
4	Proto-Italic	*kʷetru-	—

Parnell — Etymology, Origin & Word History | Etymology Explorer