The Bluetooth logo combines two runes representing a Viking king’s initials
A medieval signature in a modern icon
The familiar angular Bluetooth symbol is not simply a futuristic letter “B.” It is a bind rune: a single emblem formed by combining two runic characters. Those characters are Hagall and Bjarkan, the Younger Futhark equivalents associated with the initials H and B for Harald “Bluetooth” Gormsson.
According to the official Bluetooth history, the design directly connects today’s wireless standard to the Viking-age king who inspired its unusual name.
Why a Viking king inspired Bluetooth
In 1996, engineers from Intel, Ericsson, and Nokia were working to standardize short-range radio communication between computers and mobile devices. Intel engineer Jim Kardach proposed “Bluetooth” as a temporary code name. Harald was remembered for uniting parts of Scandinavia, making him a fitting symbol for technology intended to unite otherwise separate products and industries.
The name was expected to disappear, with alternatives such as RadioWire and PAN considered for launch. Practical naming and trademark problems blocked those options, however, and Bluetooth remained.
What the two runes mean
- Hagall represents H, the first initial of Harald.
- Bjarkan represents B, the initial of Bluetooth.
- Combined, their strokes create the recognizable vertical symbol.
This layered origin gives the logo a rare quality: its name, story, and shape all express connection. A medieval ruler’s monogram became the badge on headphones, keyboards, cars, medical devices, and countless other products designed to communicate without wires.
A symbol that still fits
The emblem captures Bluetooth’s purpose itself. Two separate letters become one sign, just as the technology lets separate devices recognize and work with one another. Once you know the runes behind it, the logo stops looking abstract and starts reading like a thousand-year-old signature.
It also belongs to a wider tradition of surprising technology names. For another example, explore why Yahoo’s name became an acronym.