I have seen the Ten Commandments movie from the 1950’s and the Pharaoh has a son which grows up with Moses. This Phaorah dies and his son becomes the King/Phaorah. So Moses approaches this Pharaoh..well his stepbrother! The 1990’s version with Ben Kingsley also seemingly depicts The Pharaoh as being his stepbrother too who also hates him. Another version with Dougray Scott doesn't make his stepbrother Pharaoh, but he seemingly grows up with him and is a friend?? (Am not 100% positive the character was meant to be a brother)..I didn't like that version very much. This guy later dies in the Red Sea parting. I can't confirm the brotherhood in the last two movies. Because the made up parts can be quite..unusual.
Is there any evidence Moses had an Egyptian stepbrother in Egypt? Where did this movie tradition start? I honestly thought Moses had an Egyptian stepbrother because of the movies.