James Colleton (died 1790) explained

James Edward Colleton (c. 1709–1790) was a Member of Parliament for Lostwithiel in Cornwall.^[1] He was a great-grandson of Sir John Colleton, 1st Baronet (1608–1666). He married Lady Anne Cowper, a daughter of William Cowper, 1st Earl Cowper.^[2]

References

1. [History of Parliament]
2. [John Lambrick Vivian|Vivian, Lt.Col. J.L.]