On 28 Dec 1832 Henry Conyngham 1st Marquess Conyngham (age 66) died. His son Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 35) succeeded 2nd Marquess Conyngham in Donegal, 4th Baron Conyngham. Jane Paget Marchioness Conyngham (age 34) by marriage Marchioness Conyngham in Donegal.

On 17 Jul 1876 Francis Nathaniel Conyngham 2nd Marquess Conyngham (age 79) died. His son George Henry Conyngham 3rd Marquess Conyngham (age 51) succeeded 3rd Marquess Conyngham in Donegal, 5th Baron Conyngham. Jane St Maur Blanche Stanhope Marchioness Conyngham (age 43) by marriage Marchioness Conyngham in Donegal.

On 02 Jun 1882 George Henry Conyngham 3rd Marquess Conyngham (age 57) died at Belgrave Square, Belgravia, Westminster. He was buried at St Marys Church, Patrixbourne. His son Henry Conyngham 4th Marquess Conyngham (age 24) succeeded 4th Marquess Conyngham in Donegal, 6th Baron Conyngham. Frances Elizabeth Sarah Eveleigh-de-Moleyns Marchioness Conyngham by marriage Marchioness Conyngham in Donegal.

On 28 Aug 1897 Henry Conyngham 4th Marquess Conyngham (age 39) died. His son Victor George Conyngham 5th Marquess Conyngham (age 14) succeeded 5th Marquess Conyngham in Donegal, 7th Baron Conyngham.

On 09 Nov 1918 Victor George Conyngham 5th Marquess Conyngham (age 35) died unmarried. His brother Frederick William Conyngham 6th Marquess Conyngham (age 28) succeeded 6th Marquess Conyngham in Donegal, 8th Baron Conyngham.

On 01 Apr 1974 Frederick William Conyngham 6th Marquess Conyngham (age 83) died. His son Frederick William Conyngham 7th Marquess Conyngham (age 50) succeeded 7th Marquess Conyngham in Donegal, 9th Baron Conyngham.

On 03 Mar 2009 Frederick William Conyngham 7th Marquess Conyngham (age 84) died. His son Henry Vivien Conyngham 8th Marquess Conyngham (age 57) succeeded 8th Marquess Conyngham in Donegal, 10th Baron Conyngham.