It seems that the 'Oichi' part of her name comes from placenames in regions such as Yamato, Ise and Bicchu; additionally, since 'Kamu-oichi' can be translated as a 'godly, splendid market,' she is also worshiped as the guardian god of markets.
神名の「大市」は大和・伊勢・備中などにある地名に由来するものとみられるが、「神大市」を「神々しい立派な市」と解釈し、市場の守護神としても信仰される。