Kelvin

A tributary of the River Clyde in Scotland, called in Scottish Gaelic Abhainn Cheilbhinn: caol ("narrow") or coille ("wooded") + abhainn ("river"). As a surname, it derives from the name of the river.

As a given name, it first entered usage in the 1920s in the UK, inspired by renowned British physicist, mathematician and engineer William Thomson, 1st Baron Kelvin, who worked at the University of Glasgow for over fifty years. When he was ennobled by Queen Victoria in 1892, he chose the honorary title Kelvin, after the river which flows past his laboratory. The unit of absolute temperature kelvin (K) is also named in his honor.

In the US, Kelvin caught on as a first name in the 1950s – no doubt influenced by Kevin, which was really taking off in popularity around the same time, as well as Calvin and Melvin, which were falling out of use. It peaked in the early 1960s and has been dropping steadily since, but remains in the Top 1000 today.

Kelvin is also given to girls.

Pronounced KEL-vin.

As of October 2026, Kelvin ranked #1036 in US births in 2025 SSA, peaked at #207 in 1965, Nameberry popularity #498.