Atla saga Ótryggssonar is a relatively young text in the genre of sagas of Icelanders, most probably written in the 19th century. It takes place in Norway and Iceland during the age of the settlement of Iceland (10th century); the main character Atle grew up as a kolbítr (ash lad), but when he comes to age, he avenges the murder of his father and emigrates to Iceland. The oldest known manuscript with this text is from 1820, where it is written down in a manuscript together with other, elder saga texts.
References
Atla saga Ótryggssonar Wikipedia(Text) CC BY-SA