Query about slang "scootch"-- Why -ch?

[David W. James]

On Feb 23, 2005, at 6:50 PM, Patty Davies wrote:
> I don't have any information on origin but I have heard & used
> 'scootch'
> all my life -  I'm almost 50, West coast, southern Calif .  More often
> used
> with scootching over rather than scootch down.

> Patty

Ditto but for location.  We moved a lot, but mostly midwest.  Also
'just a scootch' when directing movement of a table or chair.

David