Hi Shirley,
I am sorry that I don't have further information on your Ficke/Vicks, but was interested in that you had traced John Fick or Johann Ficke, who appears to be the first in the line of all Vick/Fickes.
I have traced back to John Fick married Isabel Key on the 3rd December 1785. This was his third marriage ?
Samuel Fick born 24 October 1786 married Catherine Lord;St Johns
Robert Vick born 3 August 1825 married Mary Ann Corlett;German
John James Vick born 7 February 1856 married Margaret Craine;German
Thomas Vick born 1884 married Isalen Gill;Douglas
Margaret Vick born 1920; Glasgow my mother.
I had noticed that the name Ficke was relatively common for German immigrants to US but was looking at Cornwall (lead/tin mining) where Fykke/Fycke occurs at a much earlier period.