Here are some possible interpretations depending on the context:
* Emphasis: It could be used to emphasize the name, like a child calling out excitedly for their friend "Ella Ella!".
* Rhythm: It could be used in a song or rhyme for its catchy repetition.
* Playfulness: It could be a cute way to address someone named Ella.
* Nickname: In some cases, it might be a nickname for a person named Ella.
Without more context, it's hard to pin down the exact meaning.