Edgar in the play "King Lear" disguises himself as mad beggar called _____?

Edgar in the play "King Lear" disguises himself as mad beggar called _____?

Explanation
In "King Lear", Edgar disguises himself as a mad beggar named "Poor Tom" to escape persecution.
"Poor Tom" is a persona of a mentally disturbed, destitute man, used to evoke pity and avoid recognition.