1. Colonel Aureliano Buendia
2. Prince Arthas
3. Paul Atreides
4. Athos, a.k.a. Comte de la Fere (with the accent)
5. Tarnum.

None of these are real, except for the fourth, but even then he had been thoroughly fictionalized that it is arguably not the same guy.

Cookies for those who can guess the origin of all five!