Based on clicking the first six or so links on the What links here page for William Roth and scanning the others, restoring the previous redirect. There are at least two more William Roths at Roth (surname), but this seems to be the best known one by far. One doesn't even have a wikipedia page at the moment.
If William M. Roth or the other William Roth should actually be mentioned here, then this should be a disambiguation page for the three in my opinion, rather than sending people to Roth (surname), which really is not a disambiguation page. Alternately, the other Roths could be mentioned on the William V. Roth, Jr. page (this page is about the former American Senator, for other Roths...).
I would drop my opposition to the move if someone actually went through and fixed the main links in disagreement. I found and de-linked one (I think that it should have gone to the William Roth who doesn't have a page). Mdfst13 (talk) 16:59, 27 June 2010 (UTC)