whip, region name
韃 centers on a whip, especially a leather whip, and by extension refers to the historical region of the Tatars (韃靼), a people associated with whips and horseback riding.
韃 combines 革 (leather) with 達, which likely contributes the sound. The character originally referred to a leather whip and was later used in the name of the Tatar people.
Leather (革) combined with 達 (a phonetic component) makes a whip: imagine a leather whip reaching (達) out to strike.
For ダツ, picture a whip cracking with a sharp 'dats!' sound: dats -> ダツ.
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