Oslo is the name of the Norwegian capital, from Old Norse, of uncertain origin and usually explained as "meadow of the gods" or "meadow below the ridge". As a given name it belongs to the recent American fashion for place names and for short o-ending boys' names like Milo and Arlo. Oslo ranked number 5673 in 2015, peaked at number 1768 in 2022 and stands at number 1969 in 2025.