If you can import the list in Excel or if you already have it in Excel, use the formulae "Proper" "Upper" "Lower". So for example if you have "JOHN DOE" in cell A2 and you want to convert it to proper case which is "John Doe", then type in this in an empty cell "= Proper(A2)" and that cell will convert the name into Proper Case.
BTW, welcome to Anandtech 😉