On July 16, 1731, American politician Samuel Huntington was born, the first man in history to hold the title of President of the United States in Congress Assembled. Namely, he was the president of the American Congress at the time when a kind of the first US constitution was ratified, the so-called Articles of Confederation. According to that document, the American state adopted the official name The United States of America for the first time.
Samuel Huntington, as President of the United States in Congress Assembled, did not have the powerful presidential powers that George Washington later received under the American Constitution (that Constitution replaced the aforementioned Confederate articles in 1789). George Washington was definitely the first U.S. president to be elected under this new Constitution, but that doesn’t preclude earlier presidents who headed the U.S. Congress under earlier rules.
By the way, Samuel Huntington is also known for being one of the signatories of the famous Declaration of Independence, and he was also the long-term governor of the American federal state of Connecticut. He was a lawyer by profession. He died at the age of 65 in his native Connecticut.