Robert Francis St Clair-Erskine, 4th Earl of Rosslyn (2 March 1833--6 September 1890) was the son of James St Clair-Erskine, 3rd Earl of Rosslyn.
Robert Francis St Clair-Erskine, 4th Earl of Rosslyn (2 March 1833--6 September 1890), known as Lord Loughborough until 1866, was a Scottish Conservative politician. Rosslyn was the son of James St Clair-Erskine, 3rd Earl of Rosslyn.