Saga is the name of an Old Norse goddess of wisdom and seems to be another name for the goddess Frigg. The name seems to come from Old Norse sjá meaning “to see”, likely in reference to the fact that she is a seeress. Saga is also a word derived from Old Norse saga meaning “saga, story”, cognate with Old English sagu (story, tale, statement). A saga originally referred to stories in Old Norse about ancient Scandinavian and Germanic history, sometimes romanticized about battles and heroes that happened in the past.
In Latin, saga means “fortune-teller, sooth-sayer, female sage”. It also seems to have some Japanese roots, the name of an emperor of Japan in the 9th century. Wikipedia writes his name with the kanji 嵯峨 meaning “steep, rugged + high mountain”. Saga is also a Japanese surname as well as the name of a prefecture in Japan, whose capital city is also called Saga.
Origin: Old Norse, Latin, Japanese