Wildwood Flower probably is the worst case of misheard lyrics of any song I know. Probably in the early 1900's when it started life as an Appalacian mountain song often performed by the Carter Family. People really only had word of mouth to pass on songs to each other and we all know ho messages passed on ear to ear can come out the last ear completely different! The original words are on line somewhere, have seen them and at least 60% of the words we now use differ hugely from the original, yet for some odd reason it still seems to work!