Sir Nicholas Throckmorton (or Throgmorton) (c. 1515/1516 – 12 February 1571) was an English diplomat and politician, who was an ambassador to France and played a key role in the relationship between Elizabeth I and Mary Queen of Scots.
His daughter Elizabeth married Sir Walter Raleigh.
See
http://en.wikipedia.org/wiki/Nicholas_Throckmorton for full biography.