Islwyn (given name)

Islwyn, is a Welsh masculine given name. It means "below the grove." It was associated with a close relationship with the land in ancient Welsh society.

Notable people with the name include:

• Islwyn Davies (priest) (1909–1981), British Anglican priest
• Islwyn Davies (1912–1987), Welsh rugby player
• Islwyn Ffowc Elis (1924–2004), Welsh-language writer
• Islwyn Evans (1898–1974), Welsh rugby player
• Islwyn John (1933–2009), Welsh Anglican priest
• Islwyn Jones (born 1935), Welsh footballer
• Islwyn Morris (1920–2011), Welsh-language actor
• Islwyn Watkins (1938–2018), Welsh ceramics artist