Family
- father James Harvey Cuthbert: Scottish
- mother Jean Wilson Cuthbert: Scottish
- brother Eric Cuthbert: died of cancer in 1944
- daughter Jessica Holm: mother, Lynn Shaw
- daughter Sarah-Jane Holm: mother, Lynn Shaw
- son Barnaby Holm: runs the House of Blues in L.A.; mother, Bee Gilbert
- daughter Melissa Holm: mother, Bee Gilbert
- son Harry Holm: mother, Sophie Baker
- step-daughter Alice Pearl Massey: born c. 1978; mother, Penelope Wilton; father, Daniel Massey
Companions
- Bee Gilbert: lived together in the 1960s; mother of Holm's son Barnaby and daughter Melissa; later involved with Andrew Birkin with whom she had two sons
- wife Sophie De Stempel: married late 2003
