The Benedictine St. Juliana 's Abbey in Rottum used to own two - thirds of the island and used it for their livestock .
The name Rottumeroog means literally ' Island of Rottum ' , after the village of Rottum on the mainland of Groningen .
The Benedictine St. Juliana 's Abbey in Rottum used to own two - thirds of the island and used Rottumeroog for their livestock .
The name Rottumeroog means literally ' Island of Rottum ' , after the village of Rottum on the mainland of Groningen .