I'm brand new here, and I hope I'm not breaking any protocol by my first post being a question.

I'm writing a screenplay wherein the main character's name changes maybe 10-15 pages in; think Genghis Khan, who was really named Temujin for much of his life, or Geronimo, who was named that after a particular battle.

Also similar to those examples, we meet the character when he is a child, and around 12 years old, he gets a new name. So - what is the appropriate way to handle that? It seems odd to call him by his new name when everyone else is calling him by his "original name."

Any thoughts?

Thanks!