it is entirely possible, given that it is not a word the aborigines used for the instrument - each tribe had a different word, some that meant 'bamboo' (which they were made from), some meaning 'throat';

the most common belief up to now is that it is an onomotopeic English word, mention of the repeated sound that it produces as didjerry, didjerry, didjerry... could be some variation of duideen dubh, but that would make sense if they were always black in appearance, which they were not,

OR that it was used in the racial sense, 'pipe of the blacks' which is very likely, given the tradition of racial epithets among colonials.