Linguist:
man : man (guy/man)
This one made me laugh, use of the word guy is rather more slang ;0)
That definition on the left, "guy", is its meaning in Kurdish: "mam" / "man" ~ "guy; fellow; uncle" ;) it is a cognate of Avestan "manu" and English "man", Dutch "man", German "mann", etc.
I stand corrected, I have no idea where I was told that it was Nordic..
"Origin: Middle English, from Old French furieus, from Latin furiōsus, from furia, fury"
Yes I too think "Old French" is correct.
By the way what is your mother tongue?