Gryffindor - Godric Gryffindor

You might belong in Gryffindor,
Where dwell the brave at heart
Their daring, nerve, and chivalry
Set Gryffindors apart;

Hufflepuff - Helga Hufflepuff

You might belong in Hufflepuff,
Where they are just and loyal,
Those patient Hufflepuffs are true
And unafraid of toil;

Ravenclaw - Rowena Ravenclaw

Or yet in wise old Ravenclaw,
If you've a ready mind,
Where those of wit and learning,
Will always find their kind;

Slytherin - Salazar Slytherin

Or perhaps in Slytherin
You'll make your real friends,
Those cunning folk use any means
To acheive their ends.
Here's a list of the houses of Hogwarts, their founders, and what the Sorting Hat has to say about them in the first book:
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