'commonly-mentioned' originates from English as a compound of 'commonly' and 'mentioned.' 'common' ultimately comes from Latin 'communis' ('shared, general') via Old French, and 'mention' comes from Latin 'mentio' ('a calling to mind') via Old French 'mencion.' The suffix '-ly' traces to Old English '-līc,' and '-ed' is the English past participle suffix from Old English.

'communis' became Old French 'commun' and Middle English 'comoun' > modern 'common'; 'mentio' became Old French 'mencion' and Middle English 'mencioun' > modern 'mention.' English then formed 'commonly' ('common' + '-ly') and 'mentioned' ('mention' + '-ed'), later hyphenated as the attributive compound 'commonly-mentioned.'

Originally, 'communis' meant 'shared' and 'mentio' meant 'a calling to mind.' In modern usage, the compound 'commonly-mentioned' conveys the idea of being 'frequently referred to.'