This is the 3373rd most frequent French word.
andres
"Andres" is not a French word. It might be a proper noun, like a name.
Here, 'Andrés' is used as a proper noun, specifically a given name.
Andrés est un prénom courant en espagnol.
Andrés is a common first name in Spanish.
In this sentence, 'Andrés' refers to a specific person being discussed.
Je pensais qu'Andrés allait venir ce soir.
I thought that Andrés was going to come tonight.
Here, 'Andrés' is used to refer to the author of a book, again as a proper noun.