I was thinking maybe Carlsson for Erik's last name. I also think looks like it could be Cnudsson.
I can also see where you got Larsdotter for the mother's last name. I don't know as I've run across any Susan's this far back in Swedish records. Looking at is some more I'm thinking maybe Karen Larsdotter. The middle letter is definitely an r if you compare it to other words that have an r in them.