The eleventh Baronet, who had no children, represented Bodmin in Parliament as a Liberal Unionist. When he died, the baronetcy passed to his cousin, who was the son of the Reverend Hender Molesworth-St Aubyn. The twelfth Baronet was great-great-grandson of Sir John St Aubyn, 4th Baronet of the St Aubyn Baronetcy of Clowance, in the County of Cornwall; the Reverend Hender Molesworth had, in 1844, assumed by Royal licence the additional surname of St Aubyn, through his mother Catherine St Aubyn. Thus, Sir St Aubyn Hender Molesworth-St Aubyn, 12th Baronet, brought into being the adjusted name "Molesworth-St Aubyn" for the baronetcy, while also providing a link back to the extinct (since 1839) St Aubyn Baronetcy of Clowance. The fifteenth Baronet was High Sheriff of Cornwall from 1975 to 1976 and also served as a Deputy Lieutenant of the county.
Molesworth, later Molesworth-St Aubyn baronets, of Pencarrow (1689)