paired with tweedledee to signify two things or persons nearly alike, differing in name, 1725, coined by English poet John Byrom (1692-1767) in his satire "On the Feud Between Handel and Bononcini," a couple of competing musicians, from tweedle "to sing, to whistle" (1680s), of imitative origin. The -dum and -dee perhaps suggest low and high sounds respectively.
To the ears of Mop and Dop it was all tweedledum and tweedledee.
"Grannie, darling," said Joyce with an agonized look at tweedledum.
Strange all this difference should be 'Twixt tweedledum and Tweedledee.
tweedledum, because he wrote the other with more e's (ease).
She's not going to have that tweedledum young parson, surely?
You're just like tweedledum and Tweedledee, and you seem to quarrel just the same as they did.
It had been only the tweedledum and tweedledee of the law that had saved him the first time.
"Tweedledee, in other words, instead of tweedledum," said Uncle Charlie.
Strange that there should such diff'rence be,'Twixt tweedledum and Tweedledee!
The difference between the two is by no means a case of tweedledum and tweedledee.