hagdon

• hag, hagdown, haglin, hagden

Unknown. Compare later haglet (“shearwater, petrel”). Attested (as hagden) from the 17th century.

hagdon (plural hagdons)

1. (regional, now rare) One of several species of sea birds of the genus Puffinus, especially, Ardenna gravis (syn. Puffinus gravis, Puffinus major), the great shearwater, and Puffinus stricklandi, the black hagdon or sooty shearwater.

• hagdon on Wikipedia.Wikipedia
• Puffinus on Wikispecies.Wikispecies
• “hagden, n.”, in OED Online ⁠, Oxford: Oxford University Press, December 2016.
• “hagdon”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.