Green’s Dictionary of Slang

1. (Aus.) a native of New South Wales.

1923

‘J. North’ Son of the Bush 115: Tommy ther drover! W’y, ’e wuz a Welshie, not er furriner! [AND].

2. a Welshman.

1951		E. Coxhead One Green Bottle 46: You’d think I was a Welshy by my name, Gwen Evans, but I’m a proper Cockney. I never saw a mountain till we came north.
1978		E. Malpass Wind Brings up Rain 23: Alice was still staring at her unblinking. ‘You deep little Welshie’, she said. It sounded more like admiration than censure.
2003		N. Griffiths Stump 92: Some mad fuckin Welshies burnin some poor ahl cunt’s retirement home.
2013		K. Sampson Killing Pool 106: The Welshie cracks him one with the side of his hand.