Investigating a Sutherland Connection

I ordered a death certificate for John Fraser Sutherland (1872-1946) today. He was my great-great grandmother's third husband.

My great-great aunt Violet was John Sutherland's stepdaughter, raised by him.

Violet's second husband was Roy Vaughn. Roy's mother's maiden name was Sutherland.

Coincidence? I don't know. That's why I ordered the death certificate. We'll see what clues it provides.