That prolific songster of the 30s 40s 50s Jimmy Kennedy [Isle of Capri, Red Sails in the Sunset...] often achieved a folkie sound, as in South of the Border, which makes one wonder if he had some traditional analogue in his mind somewhere. & surely his 40s/50s creation of the Hokey Cokey, tho the tune probably original to him, derived from such quasi-traditional children's dances as Here We Go Loobyloo?

Max Bacon's Cohen The Crooner [from film Soft Lights & Sweet Music 1936 - google if you don't know it] much derives from Yiddish music traditions, mixed with grand opera tunes {La Donn'e Mobile}, La Marseillaise, Rule Britannia, John Peel &c.

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