Ellen is the same in all dialects of English. (Names do not change according to dialect).
In Irish it's "Eibhlin"
The French spelling of Ellen is commnly "Hélène"
Ellen = Eleni
As a rule, names are not translated, so it remains Ellen.
Ellen Marmur Reveals Her Motto
Ellen S. Miller on the Sunlight Foundation
Dr. Ellen Marmur Reveals Her Most Noticeable Trait
Ellen Marmur Reveals Where She Would Like to Be