Check out the
Tallulah Bankhead site "A Passionate Life" and you will see that she was named for her grandmother who was named for
Tallulah Falls,
Georgia (qv.)
Further,
www.imdb.com says that
Tallulah, Louisiana was so named after the actress (b. Huntsville Alabama, 1902) had visited there.
I wonder if British actress
Tallulah Riley knows all this?