Isabella was actually pretty trendy before Twilight. In 2004 (a year before the first Twilight book came out) it was already #7.
Bella by itself is much more blatantly associated with Twilight than
Isabella is. The Twilight association has probably already faded with
Isabella, but
Bella will still have it for quite some time (after all,
Bella's popularity boost due to Twilight is much more obvious).
These days, no one outside of literary snark communities really cares about Twilight. What's happening to Twilight is basically like what happened to the Babysitters' Club books.
Isabella is still quite popular, but if you like it that much, you can use it.
This message was edited 5/27/2017, 8:39 AM