Sigrid's Iris - inquiry

Does anybody know the name of this beautiful Iris? Right now I have it under the name Iris 'Sigrid' and I cannot just rename flowers like that :-) Sigrid is a dear friend of mine that gave them to me last summer. I would be very glad for all information. ...Är det någon som kan hjälpa mej med namnet på den här underbara lilla irisen. Just nu går den under namnet Iris ' Sigrid' efter min gode vän