Following the very recent death of the Marquess of Ailesbury, I was curious to see how many hereditary peers remained who were 90 and above (born 1934 and earlier).
Here are the 36 hereditary peers I found, grouped by age:
100- Elgin & Kincardine
99- Walsingham
98- Knutsford
97- Donoughmore, Gisborough
96- Brain, Westmeath
95- Clitheroe, Oranmore & Browne, Queensberry, Rosebery
94- Bridgeman, Camden, Derwent, Dudley, Moyne, Newall, Saltoun
93- Eccles, Lindsey & Abingdon, Mexborough
92- Cunliffe, Hylton, Raglan
91- Annesley, Brentford, Cranbrook, Farnham, Longford, O'Neill, Weir
90- Abercorn, Crawshaw, Delamere, Gage, Wilton
Brooke