Edmund Castell (1606–1686) was an English orientalist.
He was born at Tadlow, in Cambridgeshire. At the age of fifteen he entered Emmanuel College, Cambridge, gaining his BA in 1624-5 and his MA in 1628. took him eighteen years to complete, working (according to his own account) from sixteen to eighteen hours a day. He employed fourteen assistants on the project, and spent £12,000, ruining himself in the process as there was little demand for his finished lexicon.
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