The engagement was announced 16 Apr 2009, between William Alexander Sidney [Herbert], 18th Earl of Pembroke & Montgomery (b 18 May 1978), of Wilton, Wilts, only son of the late 17th Earl of Pembroke & Montgomery (1939-2003), by his 1st wife the former Claire Rose Pelly, scion of the Pelly Barts; & Victoria, A.C. Bullough, youngest daughter Michael Bullough of Culcreuch, of Huntingtower, co. Perth, by his wife Sandra Lee-Graham.
Lord Pembroke's mother married 2ndly, 1984 as his second wife Stuart Wyndham Murray Threipland, of Trafalgar House, Salisbury, co. Wiltshire). Claire is the only dau. of Douglas Gurney Pelly, of Swaynes Hall, Saffron Walden, co. Essex, by his wife Monica Tate, only dau. of Lt Col Arthur Wignall Tate DSO, of Lenwade House, Great Witchingham, co. Norfolk.
Lord Pembroke is 18th Earl of Pembroke (England, let. pat.11 Aug 1551); 15th Earl of Montgomery (England, let. pat. 4 May 1605); 18th Baron Herbert of Cardiff, of Cardiff in the County of Glamorgan (England, let. pat.10 Aug 1551), 15th Baron Herbert of Shurland, of Shurland in the Isle of Sheppey. (England, let. pat. 4 May 1605) 7th Baron Herbert of Lea (United Kingdom, let. pat. 15 Jan 1861).
The future Countess of Pembroke and Montgomery is a sister of John Bullough of Culcreuch, Yr, who married 1998, Lady Georgiana Dorothea Mary Murray (b. 10 Mar 1967), dau of the 8th and 7th Earl of Mansfield, DL.