Fernando Pessoa (1888 – 1935) is generally acknowledged as Portugal’s most distinguished and influential poet of the Twentieth Century. Pessoa published his poems under various heteronyms (alter egos with distinctive names and poetic styles). “Autopsicografia,” one of Pessoa’s most translated poems, was written under his own name, which was itself a kind of heteronym.
Links:
[1] https://www.ablemuse.com/digital-books-17/v17/digital edition/Complete Digital Version of -/Able Muse, Print Edition (Number 17), Summer 2014