Family
- father Sir John Swinton: Was a major-general in the Scots Guards
- son Xavier Swinton Byrne: Twin of Honor; born c. 1997; father, John Byrne
- daughter Honor Swinton Byrne: Twin of Xavier; born c. 1997; father, John Byrne
- mother Judith Swinton: Australian
Companions
- John Byrne: born c. 1940; met in the 1980s
- Companion Sandro Kopp: Together since 2004
