The name "Bluetooth" comes from the name of the king at the end of the tenth century, Harald Blatand that in England also called Harald Bluetooth, probably because his dark teeth.
He is a Danish king who has successfully united the tribes that previously fought, including the tribes of the area now called Norway and Sweden. Even Scania region in Sweden, where Bluetooth technology is also included in his territory. King's ability as a unifier is also similar to the current Bluetooth technology to connect various devices such as personal computers and mobile phones.

While bluetooth logo comes from the union of two German letters are analogous to the letter H and B (short for Harald Bluetooth), ie (Hagall) and (Berkanan) which later merged.