So the easiest way is to concatenate the 3 columns into a single one...and then you can do a COUNTD, or whatever other tests you want to perform.
so add the calculated field
[Name] + [Last Name] + [Title]
You might even want to add a '/' between each, just in case a double-barrelled name, with no surname could be misconstrued as the same (unlikely, but when it comes to names I'm never surprised!)
[Name] + '/' + [Last Name] +'/'+ [Title]
Hope that does the trick.