Harry is a West Highland Terrier.
The breed probably originated at Poltalloch, in the former county of Argyll, Scotland. It was bred there for many years by the Malcolm family, whose dogs appear to be traceable back to the time of King James I of England (James VI of Scotland)
britannica.com/animal/West-Highland-white-terrier

Bella is a Jack Highland Terrier, which is a Jack Russell x West Highland White Terrier.