"Roger" is a man's first name in English. Roger Maris was a famous baseball player.
"Roger" is also an expression in radio communication meaning: "I heard you".
In spoken English, there is a similar expression: "I hear you".
Example:
Charlie: "You should stop sucking your thumb, Linus".
Linus: "I hear you." (meaning "I don't agree or disagree with you.")
