On 18 Apr 1803 John Henniker 1st Baron Henniker (age 78) died. His son John Henniker-Major 2nd Baron Henniker (age 50) succeeded 2nd Baron Henniker of Stratford upon Slaney in County Wicklow, 3rd Baronet Major of Worlingsworth Hall in Suffolk. Emily Jones Baroness Henniker by marriage Baroness Henniker of Stratford upon Slaney in County Wicklow.

On 04 or 05 Dec 1821 John Henniker-Major 2nd Baron Henniker (age 69) died. His nephew John Minet Henniker-Major 3rd Baron Henniker (age 44) succeeded 3rd Baron Henniker of Stratford upon Slaney in County Wicklow, 4th Baronet Major of Worlingsworth Hall in Suffolk.

On 22 Jul 1832 John Minet Henniker-Major 3rd Baron Henniker (age 54) died. His son John Henniker-Major 4th Baron Henniker (age 31) succeeded 4th Baron Henniker of Stratford upon Slaney in County Wicklow, 5th Baronet Major of Worlingsworth Hall in Suffolk.

On 16 Apr 1870 John Henniker-Major 4th Baron Henniker (age 69) died. His son John Major Henniker-Major 5th Baron Henniker (age 27) succeeded 5th Baron Henniker of Stratford upon Slaney in County Wicklow, 6th Baronet Major of Worlingsworth Hall in Suffolk. Alice Mary Cuffe Baroness Henniker (age 25) by marriage Baroness Henniker of Stratford upon Slaney in County Wicklow.

On 27 Jun 1902 John Major Henniker-Major 5th Baron Henniker (age 59) died. His son Charles Henry Chandos Henniker-Major 6th Baron Henniker (age 30) succeeded 6th Baron Henniker of Stratford upon Slaney in County Wicklow, 7th Baronet Major of Worlingsworth Hall in Suffolk.

On 04 Feb 1956 Charles Henry Chandos Henniker-Major 6th Baron Henniker (age 84) died. His brother John Ernest de Grey Henniker-Major 7th Baron Henniker (age 73) succeeded 7th Baron Henniker of Stratford upon Slaney in County Wicklow, 8th Baronet Major of Worlingsworth Hall in Suffolk.

On 09 Feb 1980 John Ernest de Grey Henniker-Major 7th Baron Henniker (age 97) died. His son John Patrick Edward Chandos Henniker-Major 8th Baron Henniker (age 63) succeeded 8th Baron Henniker of Stratford upon Slaney in County Wicklow, 9th Baronet Major of Worlingsworth Hall in Suffolk.

On 29 Apr 2004 John Patrick Edward Chandos Henniker-Major 8th Baron Henniker (age 88) died. His son Mark Ian Philip Chandos Henniker-Major 9th Baron Henniker (age 56) succeeded 9th Baron Henniker of Stratford upon Slaney in County Wicklow, 10th Baronet Major of Worlingsworth Hall in Suffolk.