I had to resort to actually looking up the definition of pronoun today... One of the unfortunate side effects of learning German ...
Here are the basic pronouns
Nominative
ich - I
du - you
er - he
sie - she
es - it
Sie - you (formal... I'll come back to ...
This is a really handy phrase to know.
There is a man over there
Es gibt einen Mann da drĂ¼ben
Note: Anything you talk about ...