The Newton family owns the business
Because Mike Newton's family owns it, and it is a sport store.
The store is named Newton's Olympic Outfitters. Bella works there part-time in the "New Moon" book.
They own a sporting goods store
cecil newton
It was Mike's parent's shop, Newton's Sporting Goods Store
There is no mention of such a name in the family tree of Isaac Newton.
Newton TerMeer's birth name is Newton TerMeer.
Nate Newton's birth name is Nathaniel Newton.
From the store
Daphne Newton's birth name is Daphne Williams Newton.
Newton Kaneshiro's birth name is Newton Yoshikazu Kaneshiro.
Newton Thornburg's birth name is Newton Kendall Thornburg.