Mandan re-redux

[Alan Hartley]

Koontz John E wrote:

> The element here is *maNh-a 'earth, mud, muddy, miry', cf. Dakhota maNkha
> (maNh-ka) 'earth', OP maNa' 'bank', (s^u'de)maNha 'fog' (riverbank smoke),
> Ks maNha' 'land', Os niN'maNhaN 'marsh', IO maN'ha 'earth, muddy', Wi
> maNaNha' 'mud, be muddy'.

Any chance this is part of Mandan maNta 'Missouri River'?