Sinclair1900–1960Names and SurnamesM. Sinclair, Wilford SinclairTimelineBirth1900Death1960RelationsSiblingsSinclair (1900–?)Sinclair (1900–?)Sinclair (1900–?)Half-siblingsSinclair (1910–1930)Sinclair (1910–1940)ParentsCharles Sinclair (1873–1931)Flora Swartz (?–1908)Sourceswikitree Sinclair-1701