Ásgeir Trausti Einarsson (Icelandic pronunciation: ​[ˈauːsceir̥ ˈtʰrœistɪ ˈeiːnar̥sɔn]; born 1 July 1992) is an Icelandic singer-songwriter and musician. In his Icelandic releases, he was credited as Ásgeir Trausti. In 2013, he started using the mononym Ásgeir as his recording name. He performs with his own band, the Ásgeir Trausti Band. He also plays guitar in the Icelandic band The Lovely Lion.

Source: Wikipedia (https://en.wikipedia.org/wiki/%C3%81sgeir_Trausti)