User blog comment:Kakoolookiyam/Angelica's Last Name/@comment-75.90.141.185-20120131054814/@comment-4898132-20120201200029

In real-world history, Blackbeard's real name is unknown. Edward Teach was one of many of his "assumed names"...for example, Edward "Thatch" was another name.

But this is POTC Wiki, so we take information from POTC material...which all state that Edward Teach is Blackbeard's real name.