suffix
familiar suffix; diminutive suffix
Attached to names or nouns to express familiarity, affection, or endearment. Used for children, close friends, family members, and sometimes pets. More informal than さん.
太郎ちゃん、こっちにおいで。
Taro-chan, come here.
おばあちゃんが作ったお菓子はおいしい。
The sweets Grandma made are delicious.