Sir Jonathan Trelawny, 2nd Baronet

1623 – 5 March 1681), of Trelawny in the parish of Pelynt in Cornwall, England, was a Cornish Member of Parliament.

He was the fourth child and eldest son and heir of Sir John Trelawny, 1st Baronet (d. 16 February 1664), Sheriff of Cornwall for 1630.

He entered Parliament in 1660 as a Member of Parliament for his family's pocket borough of East Looe in Cornwall and the prestigious county seat of Cornwall in 1661.

[2] He was elected for both East Looe and Liskeard in 1679 but was not called on to choose between them, and again in 1681, but died before Parliament convened.

[3] He married Mary Seymour (1619–1680),[4] daughter of Sir Edward Seymour, 2nd Baronet (c. 1580–1659) of Berry Pomeroy in Devon, great-grandson of Edward Seymour, 1st Duke of Somerset, Lord Protector of England and eldest brother of Queen Jane Seymour (d. 1537), the third wife of King Henry VIII.