When was John Hancock born?
John Hancock was born on January 23, 1737.
John Hancock was born in the town of Braintree, Massachusetts, son of the Rev. John Hancock and Mary Hawke Hancock. John might have become a minister, but his father died when he was only seven years old, and his uncle Thomas Hancock adopted him. Growing up in the home of his childless aunt and uncle, John Hancock had a bright future ahead of him as the merchant Thomas Hancock was one of the wealthiest men…
"John Hancock" is presumably the problematic term in that phrase, the rest of it is pretty straightforward. "John Hancock" is slang for "signature", coming from the very prominent signature of John Hancock on the US Declaration of Independence. The John Hancock Life Insurance company had a commercial jingle featuring the line "put your John Hancock on the John Hancock".