English of Core Text: It was taught: Avram is Avraham — at first he was made father of Aram, and finally father of the whole world. Bar Kappara taught: one who calls Avraham “Avram” transgresses a positive commandment… R. Eliezer says he transgresses a prohibition.
On the daf / in context: The name change is both expansive (from local to universal fatherhood) and normative (the old name is no longer to be used).
Type of Learning
Custom
What Is Learned
The expanded name marks universal fatherhood; retaining the old name is treated as a violation.