Thank you to everyone here for all the interest and concern shown. I'm really glad to say that this hadn't turned out as badly as I'd feared. Thank you all.
I don't know if this could be relevant but her father moved to Paris and had very little to do with her whilst she was growing up. Often Riina would stay at her cousins, the Sodergrens, not to be confused with her own name of Sjogren.
This is convoluted, but my wife's brother is her cousin's partner. I'm a Briton, living in Finland for the last twenty years. This is part of what we now know.
Yes, as a percentage of the population. I live there. Actually, there are many freakish small sects etc. Very simmilar to Scotland and NI with their Wee Frees etc and splits from other denominations.
PS Sorry, this was a reply to a post above speaking of Finnish religious attachments.