Green’s Dictionary of Slang

wearing more than one ring on a single finger.

1812		Vaux Vocab. of the Flash Lang. in McLachlan (1964) 240: fawnied, or fawney-fam’d having one or more rings on the finger.
1834		(con. 1737–9) W.H. Ainsworth Rookwood (1857) 178: Ne’er was there seen such a dashing prig [...] With my fawnied famms, and my onions gay.