Born in Gloucester, England this signer was killed in a duel with Lochlan Mclntosh

The answer is Button Gwinnett.

On this day in 1777, British-born Georgia Patriot and signer of the Declaration of Independence Button Gwinnett receives a bullet wound in a duel with his political rival, Georgia city Whig Lachlan McIntosh. Three days later, Gwinnett died as a result of the gangrenous wound.