Margaret "Sis" Marose McCastland was my great-aunt and a sister to my maternal grandma--they had many siblings. If I remember correctly, their parents immigrated from Deutschland. We called her "Aunt Sis". I think she was a 'pioneer' employee for Ma Bell (IL Bell phone co.) in Chicago. I never met her husband and to my knowledge, she never had kids. I never heard anything about the Carroll surname. We didn't visit Aunt Sis very much.