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Who first isolated calcium metal in 1808?

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A labeled diagram of the periodic table entry for calcium, showing its atomic number 20, symbol Ca, atomic weight 40.078, electron configuration, and classification as an alkaline-earth metal. Icons indicate calcium is a solid with a face-centered cubic crystal structure and strongly basic oxides at room temperature. — calcium The chemical element calcium is the most abundant metallic element in the human body.

The English chemist Sir Humphry Davy first isolated calcium metal in 1808.123

He achieved this by using an electrolytic method, specifically by distilling mercury from an amalgam that had been formed by electrolyzing a mixture of lime and mercuric oxide.3