Psalmanazar is, in fact, a historical figure. He was a French literary imposter who claimed to be a native of Taiwan (then called “Formosa”) and wrote a made-up account of his travels. By the time A Modest Proposal was written, Psalmanazar had been exposed as a fraud. The Proposer is apparently unaware of this development, and writes that the “very worthy person” got his ideas from Psalmanazar.
The timeline below shows where the character George Psalmanazar appears in A Modest Proposal. The colored dots and icons indicate which themes are associated with that appearance.
A Modest Proposal