The ubiquitous Bluetooth wireless standard derives its name and iconic logo from the 10th-century Danish King Harald Bluetooth, whose initials are represented by ancient Viking runic symbols.

Key Points

• King Harald Gormsson, known as "Bluetooth," ruled Denmark and Norway during the 10th century and is credited with unifying the regions.
• Intel engineer Jim Kardach proposed the name in the 1990s to symbolize the technology's goal of uniting the PC and cellular industries.
• The Bluetooth logo is a "bind rune" combining the Younger Futhark runes for H (Hagall) and B (Bjarkan).
• The name was originally intended as a temporary codename while developers struggled to trademark alternatives like "PAN" and "RadioWire."
• The Bluetooth Special Interest Group, including Ericsson, IBM, Intel, Nokia, and Toshiba, officially adopted the name in 1998.

Why it Matters

The history of the Bluetooth brand illustrates how temporary project codenames can evolve into permanent, globally recognized trademarks due to legal and logistical constraints. This naming accident successfully created a distinct, enduring identity that now serves as a universal standard for short-range wireless connectivity across billions of consumer devices.