I have a similar happening in my family. My two uncles and an aunt were placed in the home in March 1925, my father was "fostered" to a family as he was only one. I contacted the Diocese of Superior, 1201 Hughitt Ave, PO Box 969, Superior, WI 54880 and recieved verification and another name and address because the the sisters from Superior merged with the St. Paul Province several years ago. I wrote to Sister Mary Kraft, C.S.J. Archivist at 1880 Randolph Ave., St. Paul, MN 55105 who forwarded my request to Catholic Charities Bureau, Inc., 1416 Cumming Ave. PO Box 219, Superior, WI 54880 (fax 715-394-5951). Mr. Brian Soland, Executive Director sent what the state allowed him to send which were the forms that my grandmother filled out when the children entered the home. The forms did give me names of relatives I did not know about.
I hope these addresses will provide the information you are looking for. I have one photo that was given to me by my uncle. I can email a copy if you wish - and if you still have photos of the home, I would like to see them. My email is firstname.lastname@example.org