William Gregor (25 December 1761 – 11 June 1817) was a British clergyman and mineralogist who discovered the elemental metal Titanium.
Early years
He was born at the Trewarthenick Estate in Cornwall, the son of Francis Gregor and Mary Copley He was educated at Bristol Grammar School, where he became interested in chemistry, then after two years with a private tutor entered St John's College, Cambridge, graduating BA in 1784 and MA in 1787. He was ordained in the Church of England. He became vicar of St Mary's Church Diptford near Totnes, Devon. He married Charlotte Anne Gwatkin in 1790 and they had one daughter, Charlotte-Anne Gregor. and others. But he is best known for one of his earliest discoveries: in 1791, while analysing the minerals in a black sand he had discovered in the Manaccan valley, he isolated the calx of an unknown metal which he named manaccanite. His friends and correspondents included John Hawkins, Philip Rashleigh and John Ayrton Paris. Never letting his scientific work interfere with his pastoral duties, he was also a distinguished landscape painter, etcher and musician. He died of tuberculosis on 11 June 1817 and was buried at nearby Cornelly church.