The spelling of the word "Sohnnja" is interesting due to its unique phonetic transcription. The word is pronounced as /ˈsɔnja/ with a stress on the first syllable, which can be easily identified by the IPA transcription. The word, which is not a commonly used one, lacks any distinct etymological roots. It appears to be derived from "sohn" which is a German word for son. While the double 'n' in the spelling might seem unnecessary, it ensures the correct pronunciation of the word.