Dillwyn may refer to the following:
People with the surname
- Amy Dillwyn (1845-1935), Welsh novelist
- Lewis Llewelyn Dillwyn (1814-1892), Welsh industrialist and Liberal politician
- Lewis Weston Dillwyn (1778-1855), British porcelain manufacturer, naturalist and Member of Parliament
People with the name
- Dillwyn Parrish (1894—1941), American writer, illustrator, and painter.
- Dilly Knox born Alfred Dillwyn Knox (1884–1943) British codebreaker.
- John Dillwyn Llewelyn (1810–1882) Welsh botanist and pioneering photographer.
|This disambiguation page lists articles associated with the title Dillwyn.
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