For example, we have Edward Stanley, the 14th Earl of Derby and Edward Stanley, the 15th Earl of Derby.
Wikipedia:Naming conventions (names and titles) might suggest these should be [[Edward, 14th Earl of Derby]] and [[Edward, 15th Earl of Derby]].
Or, it should be [[Earl of Derby]] and [[Edward, 15th Earl of Derby]]. The 14th Earl of Derby was Prime Minister, and arguably moreso *The* [[Earl of Derby]] than the 15th Earl of Derby.
I must say I dislike this, because there are plenty of minor conflicts of fact to sort out in research of a given century without having to chase down every Lord Halifax to ascertain whether they are *The* [[Lord Halifax]] for all centuries.
Appeals for "consistency" may have been blown away in debate on city names, but I've more important things to do than play favorites between this Lord Halifax and that Lord Halifax.
In no case is it [[Edward Stanley, 14th Earl of Derby]] and [[Edward Stanley, 15th Earl of Derby]]. "English-speakers do not put family names as part of the title."
Meanwhile, [[Thomas Stanley, 1st Earl of Derby]] redirects to [[Thomas Stanley]]...