Alter, derived from the Latin word 'alter', meaning 'other'. It's of Germanic origin and was traditionally used as a nickname for someone considered otherworldly, eccentric, or an outsider in some way. Alter is often associated with the phrase "alter ego," which translates to another self, emphasizing the connection to someone who feels they have a distinct, hidden side. Historically, it has been more prevalent among German-speaking populations but can also be found elsewhere as a rare given name or surname.
The name Alter experienced periods of popularity and decline over the years, with a significant increase from the late 20th century onwards.