For those of you who like to add 1154984165444 coats of arms to every new person you add to your tree:
Q. Do coats of arms belong to surnames?

A. No. There is no such thing as a 'coat of arms for a surname'. Coats of arms are inherited in the male line and so are surnames. But a coat of arms is granted or confirmed to one person and their descendants in the legitimate male line so only that family group will be entitled to the coat of arms, not everybody of that surname. As such many people of the same surname will often be entitled to completely different coats of arms, and many others of that surname will be entitled to no coat of arms at all. For any person to have a right to a coat of arms they must either have had it granted to them or be descended in the legitimate male line from a person to whom arms were granted or confirmed in the past.

https://www.college-of-arms.gov.uk/resources/faqs

For those of you who like to add 1154984165444 coats of arms to every new person you add to your tree:
Q. Do coats of arms belong to surnames?

A. No. There is no such thing as a 'coat of arms for a surname'. Coats of arms are inherited in the male line and so are surnames. But a coat of arms is granted or confirmed to one person and their descendants in the legitimate male line so only that family group will be entitled to the coat of arms, not everybody of that surname. As such many people of the same surname will often be entitled to completely different coats of arms, and many others of that surname will be entitled to no coat of arms at all. For any person to have a right to a coat of arms they must either have had it granted to them or be descended in the legitimate male line from a person to whom arms were granted or confirmed in the past.

https://www.college-of-arms.gov.uk/resources/faqs