Euphemia Buchan (1798-1872) (1798–1872) Parents Thomas Buchan, 13th of Auchmacoy Euphemia Turner Children James Augustus Sinclair, 16th Earl of Caithness Charles Home Sinclair Euphemia Margaret Sinclair Thomas Buchan Sinclair Nicola Helen Meredith Sinclair Siblings James Buchan, 14th of Auchmacoy Partners John Sutherland Sinclair