The spelling of the name "Oliwjer" can be a bit confusing due to its unusual pronunciation. It is pronounced as [o-lee-vyer], with the stress on the second syllable. The "l" in the first syllable is silent, while "w" is pronounced as "v". The "j" in the second syllable is pronounced as a "y" sound commonly found in the word "yet". Overall, the spelling of Oliwjer may seem unusual, but it accurately represents its unique pronunciation.