Even here in Osaka I don't hear it very often among anyone even remotely
young, but where does this come from originally? Does anyone have a reference
on hand?

If I myself had to guess from what I know of classical Japanese I would think
it could be

（打ち消し）ぬ → （連用形）に + あり + たり → にありたり → にありた → なりた → なんだ

Thanks.
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2014-07-26T11:04:53.680
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2014-08-04T10:23:26.183
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question
etymology classical-japanese kansai-ben
The origins of なんだ as in 飲まなんだ　or せなんだ
According to a dictionary,

> この語の成立については未詳。一説に「ぬあった」の転かともいう

[source](http://kotobank.jp/word/%E3%81%AA%E3%82%93%E3%81%A0)
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2014-08-04T10:23:26.183
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2014-08-04T10:23:26.183
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answer