The more common form of this name in Ukraine is Semen (Семен, Se-mEn). Famous bearers are Semen Hulak-Artemovsky or Semen Paliy. Symon (Симон, SI-mon) is rather rare form, mostly ecclesiastical or biblical (Симон Зілот - Simon the Zealot, Симон Маккавей - Simon Maccabeus). [noted -ed]
https://books.google.de/books?id=X51iDwAAQBAJ&pg=PA262&lpg=PA262&dq=Symon+belarus&source=bl&ots=GmWav_JP17&sig=ACfU3U2AChLeOFTa0had5CxiAHnXY3w6dA&hl=de&sa=X&ved=2ahUKEwitztn9m-fjAhXBI1AKHZKHCVEQ6AEwD3oECAoQAQ#v=onepage&q=Symon%20belarus&f=false --- poet Symon Polatski
http://www.mein-grodno.eu/francisak_bahusevic.html --- pseudonym Symon Reŭka