Roman god
Roman gods were deities worshiped on the planet 892-IV by the inhabitants of that world's .  By the 23rd century, when the planet had attained a technology level equivalent to 20th century Earth, the names of several of the Roman gods had been commercialized and were used to promote sales products. ()

By 2268, a widespread movement, known as the Children of the Son, actively denounced the Roman gods and instead preached a philosophy of peace and brotherhood.  The movement was based largely on the teachings of 892-IV's version of a Jesus Christ figure, an entity known as the Son. ()

Roman god products

 The Jupiter 8 - named after the god Jupiter, this was an automobile containing an Internal combustion engine
 Mars Toothpaste - Toothpaste associated with the God Mars
 Neptune Bath Salts - Bathing product associated with the God Neptune

Background

The names of the Roman gods mentioned in the episode all mirror Earth counterparts which were based on earlier Greek counterparts.  Kirk and crew had actually encountered the god Apollo prior to this point, although Captain Kirk shows little reaction to the Roman gods when he learns of them. ()
Mythology