Because of his leadership and oratory skills he was named "The Patriot" by the people - a title earned by his confrontation with King Charles over the payment of the King's "Ship Tax". In Parliament he apparently spoke not very often, but when he did everyone, including the King, took notice. He represented the Cornish constituencey of Grampound.
There are many towns in the English-speaking world named after John Hampden.There is Hampden, Maryland, Hamden, Connecticut and Hampden, Maine, Hampden, New Zealand as well as the county of Hampden, Massachusetts. (Hampden South Australia is named after a member of an early local family.) Also, Hampden-Sydney College in Virginia is named in his honour and that of Algernon Sydney, another English patriot.