SQL & PL/SQL :: Show Missing Rows In Query

SQL> select * from t1;

NAME
----------
JACK
JOHN
JENN

SQL> select * from t2;

NAME
----------
JACK
PAUL

SQL> select a.name from t1 a, t2 b where a.name <> b.name
2 order by name;

NAME
----------
JACK
JENN
JENN
JOHN
JOHN

I would have expected to see the following:

name
-----
JOHN
JENN
PAUL

how to fix this query? In additon, is there a way to print the table name or some arrows (>>, <<) to show which table the values came from

I.e

name
=====
JOHN t1 or <<
JENN t1 or <<
PAUL t2 or >>