Reading the thread, some misconceptions about heraldry seem to pop up.
>>17869305The wider populace did not have last names before 16th century at the earliest. They used to be exclusive to nobility. As population expanded and censuses became more complicated, people were forced to adopt them. Usually they copied the last name of a local lord or a landmark (which itself originated from a lord's title or he adopted as his title). Thus sharing a last name with a family that has a coat of arms usually means nothing.
You have to do a genealogical research to find if any of your ancestors had a coat of arms (and what are the succession laws).
>>17869353Coats of arms are always given with a noble title (be it a family or a personal or title), however this doesn't preclude people with no title having a coat of arms made. Being a peasant with a coat of arms is fully legitimate. At certaint times it was popular to get among the bourgeoise as well.
As for coats of arms typically being given to individual, that's an anglophone peculiarity. In Western and Central Europe it was typically awarded as a family thing. A person had to go out of their way to have a personal coat of arms made on the basis of the family one. In Eastern Europe coat of arms was often shared among everyone in a noble clan.
>>17869758Technically no, as there is no centralized heraldic authority for the whole world. However, if something goes against the universally agreed rules and art canons, you'll be given side eyes constantly. If a coat of arms speaks prestige, then a bad coat of arms announces a fool.
>>17870060In most (probably all) countries, coats of arms are made by whichever heraldist the client choses. Any serious professional nationally or internationally publishes a collection of all of their work regularly.
That being said, unless you're an aristocrat or a knight, having a coat of arms will probably be seen as kitsch. It's not like you can use it by itself for, well, anything.