If you get a second scientist with the same name it might be renamed or get a roman number after its name. Happened to me and a few others the first age with the new system, and at first it simply did not display the second scientist, even when the bonus was clearly displayed. I tried to move the one scientist that was shown with the effect that the other got forcefully changed to the same category. After that I reported the issue in bugs and they got roman numbers, in fact I think most scientist then got a roman number cause the number of names was probably less than it is today, after an overhaul back then I've not heard about this issue anymore so probably mechanics prevent it from happening, or the number of names increased so it became near impossible for it to happen.

By the way after 3 out of 3 ages on max science I've yet to see a scientist named FSU.