Yes. 

Saamuel will never, ever confess to what happened to the proto-siblings that they had in their youth – before they even encountered Finland or Baltics to the south. 

It does haunt them since they can very easily still hear the memories of those ‘siblings’ and the culture of their land is reflected from the traditions of those kids. 

But because there is no reason to bring up that happening, it’s something Saam would much rather keep to themselves. It’s also the reason that Saam will never truly see themselves as remotely decent because they know full well what they were capable of.

The idea of what Saam will never ever confess to can be found here.