Hi RD,
Yes there was a George Dyker that was a fiddle maker. He was born 1878 in Glass, Aberdeenshire. His parents were Alexander Dyker(brother of Charles mentioned in earlier posts) and Elspet Bremner. George married Jane Robertson and had three children, Alexander, Annie, and Susan.
An auction website states this about George Dyker.
Hope it's of interest to you.
'Born in Aberdeenshire, 1878. Resident in Drumduan Forres (Morayshire), 1924. Produced first instrument in 1901. Built about 40 violins and several ’cellos. Heart and soul in complete sympathy with the charm of the Stradivarian model, absolutely no exaggeration in his delineation of the outline and graduations. Workmanship perfect down to the minutest detail, positively a delight to see. Scroll and sound-holes supremely conceived. Purfling faultless. Inside details beautifully finished. Peculiar properties of various woods, even to the sound-post, carefully ascertained. Orange brown shade of oil varnish applied as only as artistic mind can foresee. Occasionally tried a reddish shade. Instruments that must surely have a high and permanent place in the future. Dyker, in travelling the road of scientific exactitude, also kept in view that elusive thing known as tonal quality, which is as resonant and clear as anything heard, and is already of that peculiar quality which rapidly develops under the stimulus of the bow.'