A peerage of the Kingdom of Ireland.
Letters patent issued on Thu 26th Apr 1759
To William Duff as Promotion in the peerage of Ireland.
|Number||Surname||Forenames||Held from||Held to|
|1st||Duff||William||Thu 26th Apr 1759||Fri 30th Sep 1763|
|2nd||Duff||James||Fri 30th Sep 1763||Tue 24th Jan 1809|
|3rd||Duff||Alexander||Tue 24th Jan 1809||Wed 17th Apr 1811|
|4th||Duff||James||Wed 17th Apr 1811||Mon 9th Mar 1857|
|5th||Duff||James||Mon 9th Mar 1857||Thu 7th Aug 1879|
|6th||Duff||Alexander William George||Thu 7th Aug 1879||Mon 29th Jan 1912|
Peerage extinct on Mon 29th Jan 1912 with the 6th holder .