sobriquet
/ˈsəʊ.bɹɪ.keɪ/
ot noun
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A familiar name for a person (typically a shortened version of a person’s given name).
“The Bard” is a sobriquet of English playwright William Shakespeare.
Manbalar: Wiktionary (Free Dictionary API orqali), Datamuse, Tatoeba (CC BY 2.0 FR), MyMemory.