>>I'd have thought that the word "lemon" originates from a place where they would grow, originally, and that wasn't England.
>>...
>
>Lemons come from Southern Europe (Greece probably). What your area has is "limeys". {gd&r}

Ah, well, quite topically, as I understand it, the Americans started calling British sailors "limeys" because of their habit of eating "limes" to stave off scurvy, and lemons, in those days, were called "limes".
To me it doesn't sound like a disparaging or insulting soubriquet, suggesting, as it does, healthy body and eating, unlike some of the American words for other foreigners.

Yah Boo Sucks!