What will make a good twins name?

I know twins named Hayley and Megan... and also Adam and Eric, and Sarah and Rachel, Ashley and Breanna. I like Britany and Breanna for girls... If you wanted to change the spelling it could be Breannah and Brittany.. or Brittanie........ I also like Andrew and Ryan for boys. Some other names I like.. Scarlette and Charlotte... I think those are really pretty names to...