Dunnett

• As a Scottish surname, variant of Dunnet, a place in Caithness, Scotland, probably from Scottish Gaelic dùn (“fortress, stronghold”).
• As an English surname, from the Old French surname Donat, from Latin Donatus (see Donat).
• Also as an English surname, from the placename Downhead in Somerset or several places called Donhead, both from Old English dūn (“hill, down”) + hēafod (“head end”).

Dunnett

1. A surname.