During the twelfth century, the family crest was a special marking or symbol used by English knights to help them identify kins and countrymen during battles. The use of this special marking or symbol spread throughout Europe that eventually, the family crest served to identify clans, giving identity to families.
In your search for your own family crest, you may come across one that may be yours. However, that family crest may belong to a namesake and not from someone who comes from your lineage. One important thing to note is that coats of arms were historically given to an individual, not to a family name.
So what do you do if a family crest can't be authenticated? Or if your family does not have a family crest? You can create one! The article, "How to Create a Modern Family Crest," gives you tips on how you can create your very own family crest -- from designing a family crest to incorporating your ethnic heritage in the family crest to finalizing the design of your family crest.