Green’s Dictionary of Slang

monniker v.

to name.

1929		S. Ornitz Haunch Paunch and Jowl 255: Hunch. Hunch, that’s what I’ll monicker you. Hunchy-boy.
1942		W. Winchell On Broadway 19 June [synd. col.] Angel Street: Well-monikered.
1963		F. Kohner Affairs of Gidget 100: His wife (whose name is Alida) should properly have been monikered Frigida.