Gyges

Gyges, a young shepherd of Lydia, who, according to classic legend, possessed a magic ring of gold by which he could render himself invisible; he repaired to the Court of Candaules, whose first minister he became, whose chamber he entered invisibly, and whom he put to death to reign in his stead.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Gwynn, Nell * Gymnosophists
Gustavus III.
Gustavus IV.
Gutenburg, Johannes
Guthrie, Thomas
Gutta-percha
Guy, Thomas
Guy of Warwick
Guyon, Sir
Gwalior
Gwynn, Nell
Gyges
Gymnosophists
Gymnotus
Gypsies
Haafiz
Haarlem
Habakkuk
Habberton, John
Habeas Corpus
Habington, Thomas
Habington, William