How sure are you that Johannes existed? On familysearch, I found a birth date for Josephine of 26 Jun 1860 and christening date of 25 Dec 1860 in Ullensaker. Found the same dates for Edvard. This would make triplets if Johannes had the same birthdate.
Plus, I found the christening record in the church records, and only two names were given, therefore only twins? Names looked more like Josephine and Edvard.
Are you the same person who has a family tree on ancestry dot com?