Feni is named after the river Feni. In the poetry and literature of the poets and writers of the Middle Ages, we find the word funi as the source of a special river and the crossing of Feni. In the sixteenth century, the poet Kabindra Parameshwar wrote in the description of Paragalpur, 'Surrounded by the river Fani, the Mahagiri can be crossed in the east. In the seventeenth century, the word 'Fani' became 'Feni' in Mirza Nathan's Persian 'Bahristhan-i-Gayire'. In the last part of the eighteenth century, the poet Ali Reza Prakash Kanu Fakir, while describing the location of Hajigaon, the abode of his Pir, wrote, 'A groom upam south of Feni, Hajigaon was the name of that country' Mohammad Mukim, while describing his ancestral settlement, said, "Jugidia is a country to the west of Feni. Needless to say, they also used the word Feni in the sense of river. In the language of Muslim poets and writers, the original word 'Fani' has become Feni.