I'm not sure of any connection - but I grew up in Cornwall and we sometimes use 'Janner', which comes from "Cousin Jan", in the Southwest. The article briefly t

I'm not sure of any connection - but I grew up in Cornwall and we sometimes use 'Janner', which comes from "Cousin Jan", in the Southwest. The article briefly touches on Cousin Jan, but didn't link it to the word that's still in use today (means someone born near the sea, or someone from Plymouth). I'm just thinking "Cousin Jack" is a very easy transformation from "Cousin Jan" if you're trying to 'decornishify' the word and pick a generic English sounding name. Could be why it became the common fib name people told their bosses when introducing other cornish people for employment? Maybe a stretch though, I'm just spitballing. https://en.wiktionary.org/wiki/Janner https://en.wiktionary.org/wiki/Janner