I have reason to believe the Wincey name is an anglicized version of da Vinci. I have traced back my ancestors to England/Channel Islands and Australia. However, there is one website that says a Wincey in Australia (of whom I am distantly related) believed he was of kinship to Leonardo da Vinci (the artist) in the 14th century.
If anyone has evidence of this, please contact me.
Greatly appreciate it.
Dan J. Wincey
Nova Scotia, Canada