'oddly' originates from the word 'odd', which comes from Old Norse, specifically the word 'oddi', where 'odd' meant 'point' or 'triangle'.

'odd' changed from the Old Norse word 'oddi' and eventually became the modern English word 'odd'.

Initially, it meant 'point' or 'triangle', but over time it evolved into its current meaning of 'strange' or 'unusual'.