Tester (surname)

Tester, and variants Testar and Testard, is a surname of French origin, originally given as a nickname to one with a large head.
The name may refer to:

In the arts

Desmond Tester, Anglo-Australian actor
Ruth Tester, American actress
Scan Tester, English folk and country musician
William Tester, American novelist

In politics

John Tester, American politician and businessman
Jon Tester, U.S. Senator from Montana

Other people

Mark Tester, Australian botanist
Ralph Tester, head of the Testery, a British codebreaking station at Bletchley Park