Sir Robert Maunsel (born c. 1150) was a Templar under Baron Gilbert de Lacy in Palestine during the reign of Henry II.

[4] There was great confusion over the succession after the death of Sir John Bell William Mansel, 11th Baronet in 1883.

However, in 1903 the latter discovered evidence that his grandfather's first marriage was indeed valid and relinquished the use of the title in favour of his uncle Edward Berkeley Philipps (later Mansel), who became the twelfth Baronet.

Following her death without issue in 1786, it passed to her aunt Mary Mansell, who had married John Ivory Talbot of Lacock Abbey, Wiltshire.

On his death without issue, it passed to his elder brother's son George Child Villiers, 5th Earl of Jersey.

[11] In 1622, John Maunsell, Esq., of Chicheley, Buckinghamshire, a barrister, purchased from Lord Holland the rectory, manor, and estate of Thorpe Malsor, about two miles west from Kettering, Northamptonshire, in Rothwell Hundred.

[12][13] From that time, the main stock of the family continued to reside at Thorpe Malsor in affluence and distinction.