"Skeat" is the winner of a competition by Google, to create a gingerbread house using its program SketchUp, including "dynamic candy" in the construction:
The old version of the OED I have, however, says following Skeat that the English word "gun" may derive from the Norse woman's name Gunhilda given to an ancient artillery piece -- or else from a compound of "gun" + "hilde", approximately, both of which have martial meanings.
Skeat considers the English word was taken from the Welsh _caban_, rather than from the French, and that the original source for all the forms was Celtic.
Incidentally, Skeat père makes no mention here of his close collaboration with J.A. H. Murray on the original Oxford English Dictionary:
Tim, I just looked at the Distributed Proofreaders link Cally posted and boy do I wish I had time to get to the "hard poetry" level in time to proof the Skeat I have sitting on my bookshelf here...and there are pulldown menus for all sorts of diacriticals and things.