Ways to solve Diana being a lone child on the island:
- Diana is the only child on the island, with thousands of aunts. Deal with it, Pérez did
- Amazons later were taught to sculpt new children from clay. I think Marston introduced this
- Some or several Amazons were with child upon arrival at Themyscira. Diana thus had older sisters
- Sex pirates. Just lets not go there
Ways to solve Diana's age:
- Diana is 3,000 years old upon arrival in Man's World. Deal with it
- Time goes differently due to the magical nature around Themyscira, so Diana is whatever the desired age is
- The gods only instructed Hippolyta on how to create Diana a short time ago. This was Pérez's solution
- Sex piracy every 30 years. Just lets not go there