Green’s Dictionary of Slang

snyder n.

a tailor.

1600		Weakest goeth to the Wall line 452: Gootsmoorkne beest thou a Snyder? snip, snap, met te sheares.
1821		W.T. Moncrieff Tom and Jerry I iv: I knew Dicky would finish him. There’s not a better snyder in England.
1825		C.M. Westmacott Eng. Spy I 134: ‘An old snyder,’ whispered Jehu.
1828		G. Smeeton Doings in London 45: If the master happens to order clothes [...] at the house of a ‘snider’.
1860		Hotten Dict. of Modern Sl. etc. (2nd edn) 222: Snyder a tailor. German, schneider.
1864, 1867, 1870		Hotten Sl. Dict.