Kusimanagara, a Pali name for the city. This is supported by the fact that the Portuguese call Pathein "Cosmim."

Another theory is that modern name Pathein potentially derives from this time period based on the word Patkain, a version of the archaic Burmese word for Muslims pathi , based on either the growing presence of Arab traders in Pathein during the 16th century or on a purported Muslim Indian who ruled the city around 1233