term of endearment

hellittelysana, hellittelynimi A word, phrase, or nickname used as a term of address expressing affection.
1846, w:Charles Dickens|Charles Dickens, Dombey and Son, ch. 1:

The words had such a softening influence, that he appended a term of endearment to Mrs. Dombey's name (though not without some hesitation, as being a man but little used to that form of address): and said, ‘Mrs. Dombey, my—my dear.’

"Kun" is a term of endearment often used in Japan for small boys. Yoshi-kun lived with his parents and grandparents in a house in Takasaki.

The people of Madagascar call him Deba, which means Big Boss. When President Didier Ratsiraka came to power 26 years ago, the moniker was meant as a term of endearment.