Why blue tooth named this one?

Bluetooth is named after a Danish Viking and King, Harald Blåtand (translated as Bluetooth in English), who lived in the latter part of the 10th century. Harald Blåtand united and controlled Denmark and Norway. The name was applied to Bluetooth the wireless hook-up for electronic devices as it unites different equipment. The Bluetooth symbol looks like a rune to commemorate the Viking heritage and the stones Harald Blåtand had erected to record his rule.