Harald is a Germanic masculine given name derived from the Old Norse words "har" meaning "army" and "valdr" meaning "ruler" or "commander". It was a popular name among the Norse and Viking cultures, particularly in Scandinavia, during the 8th to 11th centuries.

The name Harald has its roots in the ancient Norse mythology and is associated with the god Odin, who was also known as the "Ruler of Armies". It was a name often given to Norse warriors and leaders, reflecting their strength, bravery, and leadership qualities.

One of the earliest recorded examples of the name Harald can be found in the Old Norse sagas and historical accounts. Harald Fairhair (c. 850 - c. 933) was a Norwegian king who is credited with uniting Norway into a single kingdom during the 9th century. Another notable Harald was Harald Hardrada (1015 - 1066), a Norwegian king who attempted to conquer England in 1066 but was defeated and killed at the Battle of Stamford Bridge.

In the Middle Ages, the name Harald gained popularity across various European regions, including Germany, the Netherlands, and England. Harald Bluetooth (c. 935 - c. 986) was a Danish king who ruled over what is now Denmark and Norway. He is credited with introducing Christianity to Denmark and is remembered for the Bluetooth wireless technology standard named after him.

During the Renaissance period, the name Harald was used by several notable figures. Harald Sæmundsson (c. 1556 - 1638) was an Icelandic mathematician and cartographer who produced some of the earliest maps of Iceland. Harald Graun (1701 - 1759) was a German composer and singer who was a prominent figure in the Baroque era.

In more recent history, Harald Sohlberg (1869 - 1935) was a renowned Norwegian Neo-Romantic painter known for his landscape paintings, including the famous "Winter Night in the Mountains". Harald Saeverud (1897 - 1992) was a Norwegian composer and one of the leading figures in Norwegian music during the 20th century.

Overall, the name Harald has a rich historical significance and has been borne by numerous influential figures throughout the centuries, particularly in Scandinavia and Germanic regions, reflecting its strong ties to the Norse culture and mythology.