This is the 2823rd most frequent Swedish word.
aleksandr
"Aleksandr" is not a Swedish word but a name, the Swedish variant of the name Alexander.
Here, 'Aleksandr' is used as the name of a person, denoting a specific individual.
Aleksandr är en vän till mig.
Aleksandr is a friend of mine.
In this sentence, 'Aleksandr' refers to the name of the famous Russian author Aleksandr Pushkin, indicating the creator of a written work.
Jag läste en bok av Aleksandr Pushkin.
I read a book by Aleksandr Pushkin.
Here again 'Aleksandr' is used as a person's name, denoting a person actively participating in a conversation, illustrating proper usage in subject position.