This is the 477th most frequent Swedish word.
benjamin
In Swedish, "benjamin" colloquially refers to the youngest or most inexperienced person in a group.
Here, "Benjamin" is used as a proper noun referring to a person's name.
Benjamin är en elev i min klass.
Benjamin is a student in my class.
In this context, "benjamin" is used metaphorically as a term meaning 'the youngest member of a group.'
Föreningens benjamin var endast 16 år gammal.
The youngest member of the association was only 16 years old.
Again, "Benjamin" is used as a proper noun, referring to a person, while showing possession with the genitive 's ending.