Etymology of the name Underhill:

The English surname "Underhill" was derived from early Modern English, where it was used to mean a small town or hamlet located at the base of a mountain or hill.

Underhill is a town in Vermont, USA.

Underhill is the name given to the area of land at the northern end of the Isle of Portland in Dorset, England, which is very steep and contains the villages of Chiswell, Castletown, and Fortuneswell. The rest of the island is known as Tophill.

Underhill School is the name of a school on Mays Lane, Barnet (near Underhill Stadium, the home ground of Barnet Football Club in the United Kingdom).

Underhill Stadium is the home ground of Barnet Football Club in the United Kingdom.

Underhill is a street and residential neighbourhood in Toronto, Canada, near the intersection of the Don Valley Parkway and Lawrence Avenue E.

Evelyn Underhill was an English mystic and writer on mysticism.

In the novel The Lord of the Rings, "Mr Underhill" is Frodo Baggins's travelling name.

In the science fiction novel Red Mars, Underhill is the name of the first settlement on Mars.

Underhill is a character in the short story The Rule of Names by Ursula K. Le Guin.

Underhill is the name given to the alternate reality inhabited by any multitude of fantasy creatures in Mercedes Lackey's urban fantasy novels, a reference to the Irish and Celtic Sidhe legends, where the Sidhe were defeated by mortal men and were forced under the Irish/Scottish hills as part of their surrender.

Ted Underhill was the name of the individual being scammed by Chevy Chase's character in the movie Fletch.