I understand what you mean, it is hard to find the right one (same with direct messages and sharing content) and it is quite impossible to link the wiki profile with the SCN profile.
but if you search with the name, then you can already see the numbers of wikis created with that name. of course it is possible that many with the same name could have created wikis, but in this case not. filter on the wikis, click one, In the wiki click then again the user name to see all what was touched. you can then compare the dates with the dates in the reputation history to be certain.