Many people believe Ellis Island gave new names to many of the immigrants coming into America.  The linked article claims otherwise.  Be sure to read the many comments after the article.  I love this kind of debate.  Do you believe your family name was changed?

https://www.nypl.org/blog/2013/07/02/name-changes-ellis-island 

On the other hand, people have changed their names for many reasons.  Read the following article to get another opinion, but be sure to read the last section about Ellis Island.

https://www.thoughtco.com/my-ancestor-changed-his-name-1422655