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.
The name Bormida has its roots in the pre-Roman Ligurian *bormo, meaning 'warm or bubbly', which is also connected to the deities governing springs, namely Bormō and Bormānus.