We all know that MWT fangirls over Rosemary Sutcliff the way we fangirl over her, but even so... I just re-read _The Eagle of the Ninth_ and it's so crystal clear how it inspired MWT. The themes, plot structure, intercultural issues, ... anyway.
I also noticed some familiar names. (I'm terrible with names. I can literally read and love a book and not be able to tell you the characters names, so I'm sure this isn't news to anyone else who has read it.) But...
Centurion Quintus Hilarion = commander from whom Marcus takes over at Isca Dumnoniorum
Hilarion = one of Eugenides' attendants
Aulus = surgeon at Isca Dumnoniorum
Aulus = an Eddisian soldier & minor prince