The name "Bluetooth" comes from King Harald "Bluetooth" Gormsson, a Viking king from the 10th century who was famous for uniting Denmark, Norway, and various tribes under a single kingdom. He earned the nickname "Bluetooth" because he had a dead tooth that appeared dark blue or gray. The name was suggested in the 1990s by Jim Kardach, an engineer at Intel, during the development of a new wireless communication technology. Kardach thought the analogy was fitting because just as King Harald united different tribes, the Bluetooth technology was designed to unite various electronic devices and communication systems under one standard. Originally, "Bluetooth" was meant to be a temporary codename, but it stuck and became the official name of the technology. Additionally, the Bluetooth logo is a combination of the runic initials of King Harald: "Hagall" (Ḥ) and "Bjarkan" (Ḃ), further tying the technology to its historical roots.