'commonly-distributed' originates from the combination of 'common' and 'distribute', where 'common' meant 'shared by all' and 'distribute' meant 'to spread out'.

'commonly-distributed' changed from the combination of 'common' and 'distribute' in Middle English and eventually became the modern English word 'commonly-distributed'.

Initially, it meant 'shared or spread among many', and this meaning has largely remained the same in modern usage.