Hi mattrom
Ah, I actually own a romal, at least 225 years old, from Ghana which is described in a learned journal as a neckerchief or bandana but generally called a "handkerchief" (far too big for that!) The same article says they could be used as a loincloth, but at 27" square it would be an itsy-bitsy-teeny-weeny one.
However, that could be exactly what a patch was, and something a man might give his son (can't remember if I said that in my post). What a good idea, thanks!
Thanks tatters, I read that too but I don't think those kind of patches would be of much use in 18th century Ghana!