swatch · noun, verb1
From earlier Northern England dialectal swache (“the counterfoil or counterstock of a tally”) (1512); further etymology unknown. Cognate with Scots swach, swatch. Compare English swath, swathe. Compare also Old English swæcc (“taste; flavour; odour; fragrance”).
swatch · noun2
Unknown; originally used chiefly in the East of England.
Swatch · proper noun3
Etymology from Wiktionary, CC BY-SA 4.0.