I like to believe we encourage a high standard of professionalism in Wikitree.
No matter how tempting the colourful illustrations appear in internet web pages, THERE IS NO SUCH THING AS A COAT OF ARMS FOR A FAMILY NAME, though those designs labeled "... family coat of arms" probably did, or even worse, still do belong to somebody in a family of that name.
People these days do enjoy, and are perfectly entitled to create a logo on a shield shape for something like a One Name Family Study. This could be a fun thing to do if properly researched and representative of the founding members of the family in some way. Best to describe its creation and purpose on the category page for the One Name Study and enjoy it as the logo it is, without pretending to some aristocratic heritage for the family named.
Historically and legally, a Coat of Arms is personal property, if that is not understood, think of it this way - a coat is a garment that can be only worn by one person at a time. Its as simple as that.
Your "Arms" were the special design on the linen garment you wore over your armour so people would know who you were. Quite useful in battle and in the lists.
The design of every Coat of Arms and the name of the individual who used it was recorded; it was that individual's proof of identity and pedigree.
From a family history point of view, the old records of "Visitations" by officials appointed to police the use of Coats of Arms now provide a valuable genealogical resource.
A person entitled to bear heraldic arms is described as armigerous. The arms of a man are recorded on a shield shape, those of a women on a lozenge. The extra supporters, motto and crest etc. are added as the overall "achievement of arms".
Quoting from their web page - The College of Arms is the official heraldic authority for England, Wales, Northern Ireland and much of the Commonwealth including Australia and New Zealand. "Coats of arms belong to specific individuals and families and there is no such thing as a coat of arms for a family name. From their origins in the twelfth century to the present day arms have been borne by individuals, and by corporate bodies, as marks of identification."
In Scotland it is the Court of the Lord Lyon King of Arms which regulates Scottish heraldry.
It would be interesting to research the Devlin arms of cross and stars, to see who those arms originally belonged to.