1st: Lewis Watson 1st Baron Rockingham. Died 1653. Son

2nd: Edward Watson 2nd Baron Rockingham. Died 1689. Son

3rd: Lewis Watson 1st Earl Rockingham. Died 1724. Grandson.

4th: Lewis Watson 2nd Earl Rockingham. Died 1745. Brother.

5th: Thomas Watson 3rd Earl Rockingham. Died 1746. First Cousin Once Removed.

6th: Thomas Watson 1st Marquess Rockingham. Died 1750. Son

7th: Charles Watson-Wentworth 2nd Marquess Rockingham. Died 1782. Extinct.

On 29 Jan 1645 Lewis Watson 1st Baron Rockingham (age 57) was created 1st Baron Rockingham of Northampton for having served the King during the Civil War. Eleanor Manners Baroness Rockingham (age 45) by marriage Baroness Rockingham of Northampton.

On 05 Jan 1653 Lewis Watson 1st Baron Rockingham (age 65) died. His son Edward Watson 2nd Baron Rockingham (age 22) succeeded 2nd Baron Rockingham of Northampton, 2nd Baronet Watson of Rockingham Castle in Northamptonshire. Anne Wentworth Baroness Rockingham (age 23) by marriage Lady Watson of Rockingham Castle in Northamptonshire.

On 22 Jun 1689 Edward Watson 2nd Baron Rockingham (age 58) died. His son Lewis Watson 1st Earl Rockingham (age 33) succeeded 3rd Baron Rockingham of Northampton, 3rd Baronet Watson of Rockingham Castle in Northamptonshire

On 19 Mar 1724 Lewis Watson 1st Earl Rockingham (age 68) died. His grandson Lewis Watson 2nd Earl Rockingham (age 10) succeeded 2nd Earl Rockingham, 4th Baron Rockingham of Northampton, 4th Baronet Watson of Rockingham Castle in Northamptonshire. Catherine Furnese Countess Guilford and Rockingham by marriage Countess Rockingham.

On 04 Nov 1745 Lewis Watson 2nd Earl Rockingham (age 31) died without issue. His brother Thomas Watson 3rd Earl Rockingham (age 29) succeeded 3rd Earl Rockingham, 5th Baron Rockingham of Northampton, 5th Baronet Watson of Rockingham Castle in Northamptonshire.

On 26 Feb 1746 Thomas Watson 3rd Earl Rockingham (age 30) died without issue. Earl Rockingham extinct. His first cousin once removed Thomas Watson 1st Marquess Rockingham (age 52) succeeded 6th Baron Rockingham of Northampton, 6th Baronet Watson of Rockingham Castle in Northamptonshire. He left his estates to his first cousin Lewis Watson 1st Baron Sondes (age 17) who changed his surname from Monson to Watson on 31 Jan 1751.

On 14 Dec 1750 Thomas Watson 1st Marquess Rockingham (age 57) died. His son Charles Watson-Wentworth 2nd Marquess Rockingham (age 20) succeeded 2nd Marquess Rockingham, 7th Baron Rockingham of Northampton, 7th Baronet Watson of Rockingham Castle in Northamptonshire.

In 1782 Charles Watson-Wentworth 2nd Marquess Rockingham (age 52) died. Marquess Rockingham, Baron Rockingham of Northampton, Baronet Watson of Rockingham Castle in Northamptonshire extinct.