Hello Barbara ,
I was one of 6 in our family that lived at St. Joseph's Orphanage from 1954 and 1956. The family name was Willmann. Unfortunately I don't remember St. Mary's but 2 of our family did spend a year in the "little house." I am hoping to read some of the responses you received so I can get more information for myself. I hope that is okay? By the way I was called Kathy during that time.
I hope you had some luck finding your brother.