Karl E Stenbäck was born 1834 in Utsjoki, Finland, got married 1861 in Messukylä in Finland (to Selma Josefina Grönholm) and got a son (Yrjö Ilmari)1884 in Turku (Åbo in Swedish) in Finland (1884).
That is if the facts at the LDS web site (IGI) are correct.
http://www.familysearch.org/ The question is if he ever lived in Sweden or had any connection to Sweden at all.
Extracts from IGI:
Carl Fredric STENBACK
Spouse: Emilia Ottilia Christina VON ESSEN
Marriage: 16 Jan 1834 Voyri, Vaasa, Finland
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Karl Emil STENBACK
Birth: 30 Nov 1834 Utsjoki, Lappi, Finland
Father: Carl Fredric STENBACK
Mother: Emilia Ottilia Christina VON ESSEN
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Karl Emil STENBACK
Spouse: Selma Josefina GRONBERG
Marriage: 11 Aug 1861 Messukyla, Hame, Finland
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Yrjo Ilmari STENBACK
Sex: M
Birth: 17 Oct 1884 Ulvila, Turku Pori, Finland
Father: K. E. STENBACK
Mother: Josefina GRONBERG
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His father would have been the vicar in Utsjoki, Åbo ärkestift, Kemi prosteri, mentioned in Finland's statskalender 1840: (Kyrkoherdar i Åbo ärkestift) Utsjoki Pastorat: Hr Fredric Stenbäck.
http://www.pp.clinet.fi/~pkr01/stats/stats28b.html All this is perhaps already known to you. In that case I have waisted my time. You did not give very much information and it makes it difficult for people to help you.