Einar is an Old Norse name composed of einn, "one" or "alone", and herr, "warrior", and is usually translated as "lone warrior". It was borne by Viking chieftains such as Einar Tambarskjelve and remains popular in Norway and Iceland. Einar was ranked beyond number 10,000 in 2015 and has risen almost every year since, reaching number 2,724 in 2025, its best rank in the United States, with 47 births.