Once, some time ago, there was an Ed. In this world, there have previously been two billion Eds and there are at least 191,023 Eds alive today. Ed never was and still isn’t a rare name, but no two Eds are exactly alike. Hypothetically, identical twin Eds could be nearly alike, but not many parents would give two siblings the same name, even if they weren’t twins. It would be too confusing. I guess there may be some parents out there that would consider it for the convenience of only having to yell one name when asking all their children to do something, but even then, the many disadvantages would probably outway that bit of usefulness and drive those parents to change their minds.