Sonny has 3 different meanings across 2 categories:
Noun · Proper Noun
a male child (a familiar term of address to a boy)
"Sonny, grab your coat before we leave for school."
a familiar form of address for a boy
"Don't worry, sonny, I'll get you that milk before your brother gets home."
A nickname for a male child.
"The old man patted his grandson on the shoulder and called him sonny before handing over an apple."