I have discovered 2 coats of arms for the same family and another possible one. I know one was awarded to William Blythe in the 15th century and was 3 roebucks trippant, but the other that was held by John Blyth of London and Cambridge and carried down by his descendants I don't know about. I don't know if it was presented to John himself because he was a royal physician and professor of medicine at Cambridge or whether the coat of arms was a family one. There are 2 coats of arms that are similar in that they both have 3 lions rampant and one family name is Blyth and the other Blithe but one has a chevron on it. Are they likely to be the same family but different branches? How can I find when the arms were awarded and to whom?