FAQ for
Everything Is Illuminated (2005) More at IMDbPro »

This could either refer to Alex, his guide and friend, or more likely The old man, whose name was also Alex. I say "more likely" due to the fact that the birth year is 1903.

Or this could be from the director and have nothing to do with the book or characters within.

> The movie is fictional so that fact that the dedication is to an Alex is coincidental.