> Etymology: < (i) French regional (southern, especially Savoy) picaillon, pécaillon, picayon (1643 as †picailloux in a Lyonnais source, denoting a small coin of foreign origin; compare French picaillons (plural), a slang term for ‘money, cash’ (1746 or earlier in this sense)),
and its etymon (ii) Occitan picalhon, denoting a Savoyan-Piedmontese coin (see note), and in the extended sense ‘money’, of uncertain origin, probably < Occitan piquar to ring (bells), to knock, strike (1509; of imitative origin) + a suffix, the coins being so named because they would jingle in the pocket.