Jophar Vorin
A man showed up in a German hamlet around 1850 called Brandenburg. Authorities pulled him in for interrogation because he was uncomfortable among strangers. He introduced himself as Jophar Vorin and claimed to be from Laxaria, a nation in "the part of the earth called Sakria." The only European language he knew was German, which he spoke in a bad manner. He claimed that Laxarian was his native dialect; but, he could also write in Abramian, the written language of his country's priestly order, if that was helpful. His interrogators used German. He claimed he was searching for a long-lost brother as the reason he had gone to Europe, or "Euplar" as he understood it.
Despite how perplexing it was, Vorin's story was accepted. There hasn't been much follow-up since then. We only know that he was brought to Berlin for additional questioning. According to one theory, he came from a another time period in which the Ottoman Empire never collapsed. For instance, Vorin's Sakria might have been the incorrect spelling of Sakarya, a region in Turkey. Additionally, he claimed that his faith, known as Ispatianism, was comparable to Christianity. This may be a reference to Hamza of Ispatianism, who wrote about Alexander the Great's invasion of Iran, which bordered the Ottoman Empire.
Although it's an intriguing notion, significant facts are missing. For instance, Vorin said that he was shipwrecked while traveling over the enormous ocean between Sakria and Euplar, which rules out Turkey as his country of origin if Euplar is Europe as his German indicated. In addition, he mentioned Aflar, Aslar, and Auslar in addition to Euplar and Sakria as names for other "portions [or continents] of the world," which correspond to ours quite well. Sakria may have been the North and South combined based on the Americas' noticeable absence. Why then, Sakria rather than "Amerilar"? Perhaps someone from Turkey's Sakarya region, not Amerigo Vespucci, discovered the New World in this alternate history. Possibly never.