I see you have tried very hard. the link you show is true, maybe. But the world very big. I think these are real people. They use their English name instead of real name to make it easy for the job. As far as I am aware, because this project has so many Americans, they just change their name to the English name. this post don't have enough proof. it's just my opinion.
Looks like you are the one trying very hard. Are you using braille to read this post?.
And you dont know anything about names. The original names were more Americanized than the new ones.
Avery ----> English / Grigoris ----> Greek origin
Martin ----> Latin / Denis ----> Greek origin
Savannah --->Spanish origin / Bassam ----->Arabic Origin