I don't know about a French aristocracy connection unless you go back to the 1200s where the name is said to have evolved from the French Le Qwointe. From there it became QUANCE and later (around 1600) SQUANCE. See attachment.
I'll need your e-mail address to send you the file - don't post it here. Go to my website at
http://freepages.genealogy.rootsweb.ancestry.com/~dob7/index... where you will find a link to me. (Remove the spamguard before sending)