Henry was born about 1665. Henry's father is John Sinclair and his mother was Catherine Sinclair. His maternal grandfather was John Sinclair and his maternal grandmother is Mary Wemyss. He was an only child. He died in 1723.
General Notes
SOURCES: "Ancestors/Descendants of Royal Lines" (Contributors: Manuel Abranches de Soveral, Reynaud de Paysac, H.R. Moser <Burke Peerage>, O.Guionneau, L.B. de Rouge, E. Polti, A.Terlinden <Genealogy of the existing British Peerage, 1842, and E. Lodge>) http://geneastar.org.