It seems that Victor left a son behind in Sweden. When Victor and his new wife emigrated the son moved to his mother's parents.
He kept the surname Karlsson all his life Karlsson, Seth Gottfrid b 18860628 in Västra Ed (H) d 19570424 in Törnsfall (H). Married 19100203 to Andersson, Eva Maria b 18841016 d 19510621. They both are burried at the churchyard of Gamleby kyrkogård in grave D 94-95 (from the DVD graveyards in Swe). You can contact the office at email@example.com
to find out who is the "owner" of the grave. Hopefully it's descendant.