Should it be a surprise? Not at all.
There is so much owed to the Spartans for ensuring the evolution of modern culture. And that comes from their valor at Thermopylae. What a great story: that 300 men led another 3000 against a vast army estimated at somewhere between 500,000 and a million men. In modern times there is little such fortitude—at least not since the Alamo. In doing so they averted the absolute distruction of Athens, whose culture laid the groundwork for what would become western culture. Had it not been for the Spartans, the western world might look very, very different (see It's all Greek to me).
Rounding out the top five are also some surprises from history. The number two position is firmly occupied by Achilles. Granted, little to scant evidence exists that Achilles existed outside of Homer’s Iliad, but that text led to the discovery of Troy—and if there was a fall of Troy, might there not have been an Achilles? The ancients, including Alexander, believed Achilles lived. And scholars still debate the possibility—even if it is over a pint.
Solidly number three is the only woman in the top five, but not the only woman having earned a place with Brands In History. She is Florence Nightingale. Nightingale was an interesting woman of her time—not only founding modern nursing, but few know that she was quite a statistician, or that she never married. Nightingale believed she should devote her life to Godly work.
And then there is the Red Baron. His full name was Baron Manfred von Richthofen and he is the most enduring brand from the First World War. His mark on history is the fact that he alone racked up 80 air combat wins during the war in less than three years. He is still universally regarded as the "Ace of Aces" and studied by aviators.
The takeaway here is that the popularity of these figures reveals what we admire: The heroism of the Spartans, the courage of Achilles, the compassion and intelligence of Nightingale, and the bold cunning and skill of the Red Baron. The other thing it teaches us is that the past is so much more than dates, mummies or dusty artifacts. These were people who often had an acute sense of their public images, and how to mold their personas. They were the first brand experts.