The meaning "sliding metal rod that thrusts the cartridge into the chamber of a firearm" is from 1859. From the notion of an arrow's flight comes theboltof lightning (1530s) and the sense of "a sudden spring or start" (1540s). Also seebolt-upright. ...
His first name, "Kingsley" suggests royalty, note the "King" in it. This may be the reason that in Potterwatch he was known as "Royal". Behind the scenesKingsley Shacklebolt in LEGO Harry Potter: Years 5-7 Kingsley Shacklebolt as a LEGO mini-figure Kingsley...