as a baron, becoming the first Baron St Levan in 1877. as of 2024 his descendants, the Lords St Levan, remain seated at St Michael's Mount.

The fifth Baronet's legacy also continued through his daughter and co-heir, the mother of Reverend Hender Molesworth, who in 1844 assumed by Royal licence the additional surname of St Aubyn and was the father of Sir St Aubyn Hender Molesworth-St Aubyn, 12th Baronet of the Molesworth-St Aubyn Baronets.