Green’s Dictionary of Slang

(US) pertaining to one’s name or nickname; ‘trademark’.

1979		‘Iceberg Slim’ Airtight Willie and Me 97: Jelly Drop’s jaws were inflated with his moniker candy.
1981		J. Wambaugh Glitter Dome (1982) 133: The field interrogation cards and moniker file had already been checked [...] for the nickname Mr Wheels.