Vairy possible. I'll try to look it up. Incidentally, all those posts are just quotes
from Dictionary of Phrase and Fable. It had a painfully slow server, which you
would hatehttp://www.bootlegbooks.com/Reference/PhraseAndFable/data/115.html



Search inidicates no relation of "vair" to "fur":

fur - 1301, from O.Fr. fourrer "to line,
sheathe," from fuerre "sheath, covering," from
a Frank. word based on P.Gmc. *fothram
"sheath." The n. is from the v. It was first
applied to "animal hair" 15c.