VI. Sir Robert Sinclair, fifth baronet of Stevenson, who married Isabella, only daughter of Colonel James Ker of the third regiment of foot guards, by whom he had four sons and four daughters.
SONS
1. Sir John, his heir
2. James, who, upon the death of his uncle Lord Woodhall, assumed the surname of Lockhart, succeeded to the estate of Castlehill, as before observed, and is now designed by that title.
3. Robert, bred to the law, an advocate before the court of session.
4. William, bred to the sea.
DAUGHTERS
1. Elisabeth, married to William Hay, Esq; of Spot and Lawfield in the county of Haddington, to whom she hath a son, Alexander, and five daughters.
2. Martha
3. Agnes
4. Anne
All died unmarried
Sir Robert died anno 1754, and was succeeded by his eldest son, Sir John Sinclair VII.