Revolutionary Stained Glass

Sometime in the 1960's, I came into possession of a stained glass window from the estate of Commodore Cornelius Vanderbilt's granddaughter.  I was told at the time the glass may have been a part of an original building on the estate which pre-dated the Revolutionary War.  The glass itself measures approximately 19" in length and 12.5" in width.  It has been re-leaded in places and framed in a "lucite" mold to stablize the glass.  It is inscribed with the names "Wasshington & Newce" in the bottom-most panel.  I have also been advised the colored patterns shown may be a family crest or coat of arms.

I am interested in any information or suggestion on where to research the provenance of this window, so any help would be greatly appreciated.