Very true

Foolish are one who try to 'prove' that this or that was the case 100 + years ago because somebody said, wrote in a catalogue heard/misheard it on the grapevine etc. Cutlers are in business, if they think something will sell or get well received they'll promote any naming

I recall some years back when the 2009 Forum Knife from Queen was mooted with Clip/Wharncliffe same size ,a number of fogeyish bores came out blustering that it wasn't 'traditional' on a Barlow, nobody had ever heard of it zzzzzz they soon changed their tune and swam with the tide

When Tony Bose put a Wharncliffe on a Trapper instead of a Spey (good idea!) no doubt the keepers of truth started frothing, for a while. GEC has made plenty of interesting variations on themes and some bizarre naming too
Catalogues appear to suggest that Equal End Jacks were bigger knives with equal sized blades, so-called to differentiate them from smaller Pen type construction that had Master and secondary blades.