Thanks very much Victrix, and much agreed, the term had far more relation to the Franks or Frankish, and likely had origins in medieval times when the Franks were producing high quality blades such as the Ulfberth and Ingelrii. These were widely exported, though that was tried to be curbed, and it seems the term entered a good number of languages becoming indirectly a term for 'European' I believe. As always a matter of semantics.
Some years ago I had seen references which thought the term meant 'Portuguese' probably for the predominance of Portuguese colonies and trade in subcontinent and I believe in Sri Lanka.
Jens, I cannot allow you to underestimate your knowledge my friend, after all I have learned from you these many years!
It is a complex question, and perhaps unfairly asked or at least posed. I know if anybody can find it though, you can, in your never ending travels through some of the most esoteric works on India.