This was a common name in classical Greece, and, due to both the saints who carried it and the favourable meaning, it came into general use in the Christian world, being especially popular among Eastern Christians. It was however rare in Britain before the 19th century. Famous bearers include three tsars of Russia (in the Russian form Fyodor) and American president Theodore Roosevelt (1858-1919).
In Norse mythology Odin is the highest of the gods, presiding over war, wisdom and death. He is the husband of Frigg and resides in Valhalla, where warriors go after they are slain. He is usually depicted as a one-eyed older man, carrying two ravens on his shoulders who inform him of all the events of the world. At the time of Ragnarök, the final battle, it is told that he will be killed fighting the great wolf Fenrir.
As an American given name, it got a boost in popularity in 2012 after the rapper Kendrick Lamar (1987-) released his debut album.
This name died out after the Middle Ages, but was revived in the 19th century. In America and other countries it became fairly popular in the second half of the 20th century. A famous bearer of the surname is former basketball star Michael Jordan (1963-).
It was rare as an American given name before 1975. In the mid-1980s it began growing in popularity for boys after a character by this name began appearing on the soap opera Ryan's Hope. It is now more common as a feminine name, probably due to the fame of the actress Dakota Fanning (1994-).