Jónsi, pronounced 'Yon-see', is an Icelandic given name of Norse origin that means 'gift of God'. It is a variant form of the name John and has been popular in Iceland for centuries. The name gained international recognition through the use of Jónsi as the stage name by Icelandic musician Jón Þór 'Jónsi' Birgisson, lead singer and guitarist of the band Sigur Rós.
"Jonsi is quite rare, with only five babies named so worldwide in 2020."