I wonder, was the word 'tinker' in the sense of a tinsmith applied more broadly to certain itinerant folks because of the similarity of sound to words in other languages, like 'zingari' and 'Zigeuner'? Or could it be that 'tinker' in this sense is actually etymologically related to those terms and nothing to do with tinsmithing?

Asking out of genuine interest mixed with admitted ignorance, in the knowledge that there are far more informed individuals on this message board. Thanks.