Check if there are any knewn coat of arms used in your family. The webpage contains descriptions and family facts about the over 600 coat of arms in use in Swedish common families today (that is, not the nobility). There's also a list of so far nearly 2.000 coats of arms used mostly in the 17th and 18th centuries in families who today have forget the existance of heraldry in their family. - If you can't find and old coat of arms in your family it's also never too late to assume a new one. I'm a Swedish heraldrist that can help you with that.