This has got to be the most well known Polka of all time! But I don't recall Lawrence Welk playing it on his show much. I know there are other "E-I-O-" type Polkas, too and I recall playing the E I O Polka (or something like that) in a Polka band when I lived up north in MinnNEEsoTUH. Would this be of Polish origin? Or German? Or ??