Its final 5 miles (8 km) form part of the border between Northamptonshire and Buckinghamshire, running alongside the Grand Union Canal.

Bosworth and Toller give the "Scandinavian proper names" Tófi and Tófa for comparison.

"[4][5][6] However, the clearest link for an older origin of the Tove name can be found in the dedication on the Sønder Vissing Runestone.

The 10th century carvings describe the stone as having been raised by Tófa, in memory of her mother.

The first character of her name is ᛏ, the Rune for Týr, a Northern European deity thought to be of early origins in an Indo-European Pantheon.