This is the 4018th most frequent Spanish word.
carson
"Carson" is not a standard Spanish word; it is likely a proper noun, such as a name.
In this sentence, 'Carson' is being used as a proper noun to denote a family's last name.
Carson es el apellido de mi amigo.
Carson is my friend's last name.
Here, 'Carson' names a specific historical figure known for exploration.
Leí un libro sobre el explorador Carson.
I read a book about the explorer Carson.
In this usage, 'Carson' identifies a particular street by its name.