Materials: diamonds set in gold
- Winifred Cavendish-Bentinck, Duchess of Portland
- Ivy Cavendish-Bentinck, Duchess of Portland; inherited from her mother-in-law in 1954
- Lady Anne Cavendish-Bentinck; inherited from her mother in 1982
- William Parente; inherited from his aunt in 2008
- Are there any pictures of Lady Anne or William Parente's wife wearing the tiara?