The coat of arms and heraldry for the Fay name is best shared here with a few articles that I discovered. Many countries claim origin for the name. Researchers have decided that there are actually two distinct divisions for the Fay name, the French Branch and the Irish Branch. I believe that the research previously done and my DNA results indicate our Fay line is neither. We are from either Scotland, England, Wales or Germany. The French heraldry uses a dragon and the Irish heraldry uses a boar. Below are some links to information about the Coat of Arms and Heraldry.
~fayfamily/crest.html
https://sites.rootsweb.com/
http://www.irishsurnames.com/cgi-bin/
gallery.pl?name=fay&capname=Fay&letter=f
https://www.houseofnames.com/
https://www.heraldrycrests.com/
Fay Heraldry and Coat of Arms
(Some of the different versions below)
https://sites.rootsweb.com/~fayfamily/crest.html
https://www.pinterest.com/pin/
333899759853801127/
https://sites.rootsweb.com/
~fayfamily/crest.html
https://heraldicjewelry.com/pages/
fahy-family-crest