Who first sang the 'willow song' which Desdemona sings on the night of her death?

The "Willow Song" that Desdemona sings on the night of her death in Shakespeare's "Othello" is traditionally attributed to the character of Emilia in the play. However, it is often associated with a much older folk tradition. The song's themes of loss and sorrow resonate deeply with Desdemona's tragic fate, highlighting her vulnerability and foreshadowing her demise.