Frances Wemyss (1794-1858) (1794–1858) Parents William Wemyss Frances Erskine Children James Alexander George St. Clair-Erskine, Lord Loughborough Robert St Clair-Erskine, 4th Earl of Rosslyn Lady Harriet Elizabeth St. Clair-Erskine Siblings James Erskine Wemyss William Wemyss Partners James St Clair-Erskine, 3rd Earl of Rosslyn