John Sinclair, 2nd of Barrock (died 1743) (d. 1743) Parents Anne Dunbar George Sinclair, 1st of Barrock Children George Sinclair Jean Sinclair James Sinclair Alexander Sinclair, 3rd of Barrock John Sinclair of Sibster Margaret Sinclair Siblings Katherine Sinclair Jean Sinclair Margaret Sinclair Alexander Sinclair of Swinzie Anne Sinclair Robert Sinclair Benjamin Sinclair Janet Sinclair James Sinclair George Sinclair William Sinclair David Sinclair Elizabeth Sinclair Partners Anne Sinclair Janet Dunbar