
1) Early firearm 2) English girl name 3) Large-caliber firearm
Found on
https://www.crosswordclues.com/clue/petronel

A Petronel is a 16th or 17th century firearm, defined by Robert Barret (Theorike and Practike of Modern Warres, 1598) as a horsemans peece. It was the fire-arm which developed on the one hand into the pistol and on the other into the carbine. The name (French petrinel or poitrinal) was given to the weapon either because it was fired with the butt ...
Found on
http://en.wikipedia.org/wiki/Petronel

• (n.) A sort of hand cannon, or portable firearm, used in France in the 15th century.
Found on
http://thinkexist.com/dictionary/meaning/petronel/
Pet`ro·nel noun [ Old French
petrinal , from
peitrine ,
petrine , the breast, French
poitrine ; so called because it was placed against the breast in order to fire. See
Poitrel .] A sort of hand cannon, or portable firearm, used in France in the 15th century.
Found on
http://www.encyclo.co.uk/webster/P/67

A petronel was a small carbine or horseman's pistol. So called from being fired with the stock against the breast.
Found on
http://www.probertencyclopaedia.com/browse/FPP.HTM
No exact match found.