Hawthornden or Hawthorndean is an apple

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...

that is used for cooking. It is also known as Wheeler's Kernel, Lincolnshire Pippin, and Lord Kingston, and has been incorrectly known as Maiden's Blush and Hawley.

References

Apple cultivars British apples {{apple-fruit-stub