John Hancock was an American merchant, statesman, and prominent Patriot of the American Revolution. He is best known for his large and stylish SIGNATURE on the United States Declaration of Independence, so much so that 'John Hancock' has become a synonym in the United States for one's SIGNATURE. The crossword solutions for John Hancock are SIG, AUTOGRAPH, and SIGNATURE. SIG stands for SIGNATURE, AUTOGRAPH is a form of SIGNATURE, and SIGNATURE is a person's name written in their own handwriting.