I checked through my notes and came across some information that may help you.
The spelling of Fickas possibly originated with John Adam Fickas (Fickes). He was a son of Jost Fickes. Jost came to America 1737 from Germany. He had a few sons named John (John Adam, John Martin, John Georg, and John) This was a German custom of naming children. Other children were Maria Barbara, Maria Catherine (died), Susanna, Velte, Nicolaus, Maria Catherina, and Anna Margaretha. To avoid confusion, it is said that John Adam changed the spelling to FICKAS. Interestingly, John Adam Fickas married an Eve (last name unknown). They lived in PA/VA/KY and Indiana. It appears they lived in Kentucky from 1806-1808.
I have been in touch with a descendant of John Adam-she might know more about their children as I don't have that info. Her e-mail is<SMALLNSASSY>. Also, there is a book about the Fickes family, Adam and Susan Fickas, Their Descendants and Allied Families, by Viva Fickas Freeman, 1976. You can obtain it on microfilm through the LDS library. I don't know if the book is available anywhere, although possibly through Higginson Publishers.
I hope this helps!