William Sinclair Peerage person ID=343803 Parents George Sinclair, 1st of Barrock Elizabeth Murray Children Siblings Alexander Sinclair of Swinzie Anne Sinclair Robert Sinclair Benjamin Sinclair Janet Sinclair Jean Sinclair Katherine Sinclair James Sinclair George Sinclair John Sinclair, 2nd of Barrock Margaret Sinclair David Sinclair Elizabeth Sinclair Partners Sidney Manson