Leif is a male given name of Scandinavian origin. It is derived from the Old Norse name Leifr (nominative case), meaning "heir", "descendant". Use in the Nordic countries. Spelling and prevalence. Across the Nordic countries, the most commonly occurring spelling of the name is Leif, however, there are some well-established regional variants: Norway – Leiv. Denmark – Lejf. Iceland – Leifur [ˈleiːvʏr̥] Faroe Islands – Leivur [ˈlaɪvʊɹ] In Norway, about 17,000 men have Leif as their first (or only) name. In Sweden, as of 2021, 62,147 men have the name Leif as a first name.
https://en.wikipedia.org/wiki/Leif