Robert Molesworth, 5th Viscount Molesworth

• Burke, Bernard, Sir. A genealogical and heraldic dictionary of the peerage and baronetage of the British Empire. London : Harrison 1869. page 778.

https://www.wikitree.com/wiki/Molesworth-55

Sir John not Sir Robert.

Sir John Molesworth, 5th Baronet (1729–1775) was a British politician who sat in the House of Commons from 1765 to 1775.

Molesworth was the son of Sir John Molesworth, 4th Baronet and was born on 12 March 1729. He matriculated at Balliol College, Oxford on 14 March 1749 and was awarded MA on 17 May 1751. He married firstly Frances Smyth daughter of James Smyth of St Audries, Somerset on 28 September 1755. After she died in 1758 he married Barbara St Aubyn, daughter of Sir John St Aubyn, 3rd Baronet on 2 September 1762. ...

https://en.wikipedia.org/wiki/Sir_John_Molesworth,_5th_Baronet