You really are a gold mine of valuable information, which I very much appreciate. It's a lot of work researching all this. I do have most of the names you have listed due to some earlier attempts at research, but there are several gaps that you have nicely filled in for me such as dates and places. I was thinking the same thing about the family moving around a lot...I can only guess the reason why. Maybe due to finding work...Karl had many mouths to feed.
There was a family business in Tampere (I believe it was something to do with leather tanning or making leather products). It was named Turenius (I have an old photo of my mother standing in front of the outside of the shop). How can I find out anything about who ran the business, or who owned it, etc? The photo was taken around the 1960's when she visited the city. Impi Dagmar was my mother. (Impi translates as Missy.
Thank you for all your help.