William Michael Herbert Greaves (10 September 1897 – 24 December 1955) was a British astronomer.
He was born in Barbados in the West Indies the son of Dr E. C. Greaves, a physician trained at the University of Edinburgh.
William Greaves was educated first at Lodge School and Codrington College, both in Barbados then travelled to England to study at St. John's College, Cambridge, where he graduated MA in 1919 and became a Fellow in 1922.
[5] He remained Astronomer Royal until 1955, and was Regius Professor of Astronomy at the University of Edinburgh for the same period.
In 1926 he married Caroline Grace Kitto, and the couple had a son, George Richard Herbert Greaves (1941-2008) who became Reader in Mathematics at Cardiff University.