ETYMOLOGY
adj,: apparently from Italian vago
EXAMPLE
“…no doubt but better parts, finer colours, purer lights proportionably combined, cause a more excellent beautie, shew, and lustre: as the siner gold, the richer stones (if art bee correspondent) the more vage and beautifull iewell…”
From: The Passions of the Minde in Generall
By Thomas Wright, 1604
Lexicophilia 