Hello, what data structure should I use if I need use name as a pointer?

example:
I prepare information about my workes leaves. I need know how much days the had sick leave. And I need to have them in array or something like this, But i do not want use their ID number but surname:
"smith" = 10
"Herr" = 18
"Uhrmann" = 3
etc...
How can I solve this?

Which data structure can I use? Is it possible to use array?

Greetings
Andrzej