I have the information on when the Cassel's left Germany and came to the United States.My line goes all the way back to Julius Kassel of Kriesheim Germany.My mother was Mary Elizabeth Cassel Gingles daughter of Rev. Isaac Cassel (probably not the Rev. Isaac Cassel in your information).A James Cassel from Hawaii is a relative of mine.
Keep in touch.(I am 55 years old and live and work in Wisconsin.I am a Professor and have taken students to the South Pacific to Study.We go through your state all the time.My brother lived in Hawaii and taught at the University in the late 1960's and early 1970's.He is now in Washington DC.I have another brother Joe who at this point is living back in Wyoming where we all grew up.)