Tweedledum and Tweedledee (sometimes called Tweedledee and Tweedledum) is very funny nursery rhyme that has been used for generations. The first time this nursery rhyme was sung (at least published) was in 1805 - in England.
Did you know? Tweedledum and Tweedledee has actually turned into a synonymous for people that look and act the same ways. Probably because of this nursery rhyme. Funny, isn't it?