Ah, that's interesting, thank-you for looking that up :-) From my limited experience, wells are often named after the particular cure they evoke, headache and eye being the commonest names in those classifications, that's why I was wondering about the egg possibility. I reckon the Bords are a reliable source, althought the present-day housing doesn't look very egg-shaped in the image above. Perhaps a side elevation would show it better.
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