In November 2012, aged 38, Thynn announced his engagement to
Emma McQuiston, the daughter of Suzanna McQuiston and Nigerian oil billionaire
Chief Oladipo Jadesimi, a founder and the executive chairman of
Lagos Deep Offshore Logistics. She is a younger half-sister of Iain McQuiston, the husband of Thynn's half-aunt, Lady Silvy Cerne Thynne, a daughter of his paternal grandfather, the 6th Marquess of Bath, by his second wife. Thynn’s mother was reported as strongly disapproving of her son's planned marriage, due to her prospective daughter-in-law's African ancestry, and she was not invited to the wedding. It was reported that Thynn intended to evict his father's
'wifelets' from their estate cottages, and some murals painted by his father were removed from Longleat. A rift between them developed. with Lord Bath boycotting the event. Despite the absence of both his parents, the marriage was attended by Thynn's sister. In 2026, the trustees of three of the family trusts sought High Court approval to grant Thynn a power to add as beneficiaries his younger son Henry, who was born via
surrogacy in the United States, and potentially Henry's future children. The trusts, governed by pre-1970 deeds, use historical common law definitions of family relationships, leading to uncertainty over whether the second son qualifies as a beneficiary. At a hearing in
Bristol, the judge approved the appointment of a solicitor to represent the interests of other beneficiaries including the eldest son, who could be affected by a decision to ensure Henry's rights. ==References==