Hi Rusty,
Personally i would say not. I generally supply FirstNames and Surname fields. For display purposes concatenate them, EG Surname, Firstnames. Users have the option to sort on either name.
I have gone with a single field a couple of times, but in those instances i provide a form for inputting names and have the user type FirstName(s) and Surname and then concatenate them in a set format for the Name field. If you go down this route, i would suggest storing as Surname, Firstnames, as this makes sorting slightly more 'useful'.