I just came across your post from 2000.

Elizabeth (Lizzie) Thomann Stuttig was the daughter of Edward Stuttig and Wilhemina Thomann. Sophie and Anna Stuttig were two of her sisters. Other siblings were Edward Walter, Rudy, Mary, Lena, and Charlie. Elizabeth and Dorthea Thomann were sisters.

I saw a post which said that Dorthea Thomann married Alphonse Werder. Apparently this is your Dora.