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 belive that the research previously done and my DNA results indicate our Fay line is the French Branch. 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.
The Fay Family Name and Crest History
Fay Heraldry and Coat of Arms
(Some of the different versions below)