Dai Llewelyn was a Welsh socialite who died in 2009. The name might be an allusion to actor Desmond Llewelyn, who played the character "Q" in the James Bond films from 1963 to 1999. The name "Dai" is derived from the old Celtic word dei meaning "to shine", but is also a commonly-used nickname in Wales as a familiar form of the name "David", so it's quite likely that this was 'Dangerous' Dai's real first name.
- Quidditch Through the Ages (First appearance)
- Harry Potter and the Order of the Phoenix (Mentioned only)
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