prosonomasia (n.)

in rhetoric, a kind of pun, but usually involving a name, a figure based on the likeness of a sound in two or more words or names, 1580s, abstract noun from Latinized form of Greek prosonomazein "to call by a (nick-)name," from pros "to, toward, before" (see pros-) + onoma "name" (from PIE root *no-men- "name"). 

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