Reginald Herbert, 15th Earl of Pembroke and 12th Earl of Montgomery (8 September 1880 – 13 January 1960) was a British peer. His parents were Sidney Herbert, 14th Earl of Pembroke and Beatrix Louisa Lambton, daughter of George Lambton, 2nd Earl of Durham. He descends from a Russian aristocratic family, the Woronzows, through the marriage of Catherine Woronzow to George Augustus Herbert, 11th Earl of Pembroke.
Pembroke married Lady Beatrice Eleanor Paget (of the marquesses of Anglesey) on 21 January 1904 and they had three children:
Pembroke was succeeded in his titles and estates by his eldest son.
During World War II he worked at the Foreign Office. In 1943, Lord Pembroke received an amusing letter from Sir Archibald Clark Kerr, the British Ambassador in Moscow.
My Dear Reggie, In these dark days man tends to look for little shafts of light that spill from Heaven. My days are probably darker than yours, and I need, my God I do, all the light I can get. But I am a decent fellow, and I do not want to be mean and selfish about what little brightness is shed upon me from time to time. So I propose to share with you a tiny flash that has illuminated my sombre life and tell you that God has given me a new Turkish colleague whose card tells me that he is called Mustapha Kunt. We all feel like that, Reggie, now and then, especially when Spring is upon us, but few of us would care to put it on our cards. It takes a Turk to do that. (signed) Archie