ʌnˈoʊnɪəs wʌz bˈɔːɹn ʌv swˈiːdɪʃ pˈɛɹənts ɪn hɛlsˈɪŋki swˈiːdɪʃ: hˈɛlsɪŋfˌɔːɹs ɪnðə ɡɹˈænd dˈʌtʃi ʌv fˈɪnlənd, ðˈɛn pˈɑːɹt ʌvðə ɹˈʌʃən ˈɛmpaɪɚ.
Unonius was born of Swedish parents in Helsinki (Swedish: Helsingfors)  in the Grand Duchy of Finland, then part of the Russian Empire.