Green’s Dictionary of Slang

yenom n.

money.

c.1864		A. Stephens ‘The Chickaleary Cove’ 🎵 For ready yenom down, there ain’t a shop in town. / Can tick Groves in The Cut as well as Shoreditch.
1936		Nottingham Eve. Post 9 Oct. 5/5: ‘Yenom’ for money is merely slang.
2001		J. Burkardt ‘Back Sl.’ Wordplay 🌐 yennom: money.