The hydronym Bormida derives from the pre-Roman Ligurian proto-form *bormo ('warm or bubbling water'), also linked to the names of the gods of the springs Bormō and Bormānus.
Bormida's origin can be attributed to the ancient Ligurian term *bormo, describing 'warm or effervescent water'. This concept is also tied to the gods of natural springs, including Bormō and Bormānus.