This looks like it is for their marriage. I tried to look at other records in Vaasa for them but had no luck. I did go back to the moving In/Out books and found Isak leaving Solf for Thodau on 18/6 1840. Page 156, line 45.
I went to the LDS site and found this- Isaac Johansson b-30, March 1820. Father- Johan Erss Anas, mother Brita Karpland. They were married 29/1/1820. It had Sulva, Vaasa listed. Also they had another son Jonas b- Oct. 19, 1823 also Sulva. I also found this same information with Hiski.
I have found some information on this family but cannot seem to find them in any of the record books. I found him leaving Solf in 1840 but could not find him in Solf.
Can you help me trace this family back?