named 是过去分词做后置定语,表被动.
句子可以扩充成:i have a wonderful friend who is named Max.(定语从句+被动语态）
例句：
This is the book recommended by the teacher.(recommended 为过去分词做后置定语）
Most of the people invited to the conferencewere my old friends.（invited为过分做后定）