David Sillar (1760–1830) was a Scottish farmer, poet, grocer, schoolteacher and baillie who was a close friend of the poet Robert Burns. He died in 1830, aged 70, after a long illness, and was buried in Irvine's Old Parish Church cemetery. His eroded gravestone was replaced by a facsimile thanks to the Irvine Burns Club. He married twice and had only one son survive him, a Dr. Zachary Sillar M.D. of Liverpool. His father was Patrick Sillar, tenant farmer at Spittalside near Tarbolton, Ayrshire. He first married a widow, Mrs Margaret Kerr, née Gemmell shortly after moving to Irvine and had seven children and his second wife was the sister of John Bryan of the Sun Inn, Kilmarnock.