'rarely-mentioned' originates from the combination of 'rarely,' meaning 'not often,' and 'mentioned,' the past participle of 'mention,' which comes from Latin 'mentio,' meaning 'a calling to mind.'

'rarely' evolved from Old English 'hrēor,' meaning 'seldom,' and 'mention' from Latin 'mentio,' through Old French 'mention.'

Initially, 'mention' meant 'to call to mind,' but over time it evolved to mean 'to refer to or speak about.'