The name Hieronymus, in the Latin, means “holy name” or “with a sacred name.”

In the early 1900s the Mueller Co. began a search for an engineer to redesign and modernize its line of pressure regulators. It found such a man in the person of A.W Cash, a Boston engineer who had made his reputation by developing pressure reducing valves for the Boston Pneumatic Street Car Co.

In the 1920’s the Mueller Company started giving gifts to Mueller employees upon their marriage. Each new bride was given a rocking chair and belonged to the Rocking Chair Club.