In 1869, Goldman Sachs was founded by Marcus Goldman in New York City in a one-room basement office next to a coal chute. In 1882, Goldman's son-in-law Samuel Sachs joined the firm.
Imagine working at a smithy called Smiths run by Joe Smith, who is a Smith. That's at least as wild.
It's so on the nose that if you read it in a book you'd roll your eyes and call it lazy writing
That's actually the origin of several last names like Smith. Carpenter, Miller, Cooper, waller, Fisher, Chandler, Carter, black, and barker are believed to have originated from professions.