Never in all my research have I ever come across the name McGeHee in relation to the Michie name. I have been able to trace the line to 1505 or so, and have found very few variations (Mitchie andMichee I believe were the only ones)and they were mostly mistakes in spelling on census reports and such. A possible reason why nobody wants to do a DNA test is one,they have probably not ever seen the name you have, and I would not give my DNA to a stranger. Sorry!!