Sir Nathaniel Barnardiston of Kedington, alias Ketton, Suffolk was an English landowner, magistrate and senior representative of a long-established knightly family, one of the wealthiest in Suffolk, who sat in the House of Commons for Sudbury twice and for the Shire three times between 1625 and 1648.

Sudbury was a parliamentary constituency which was represented in the House of Commons of the Parliament of the United Kingdom.