(...for those who understand Perl regexps...)

[Chalky] Tongue-in-cheek, of course. The spelling doesn't really matter, but there is definitely a distinction between Kates, Katies and the above...

[BtD] Have to agree with you on almost all of those. I would also lump Jo(h)annas in with your Joannes... Also is it just me, but girls with hyphenated names can be a bit wet, possibly deriving from an indecision on the part of their parents.

[rab] :-) I get called Katy quite a lot by certain friends - must be when I'm being jolly. But usually I'm Kathryn to my mother, and Kathy to everyone else. The only name I object to is Kath - which always sounds like the cleaning lady. Anyway - enough of me ...
[Rosie] Do we know how many letters there are in your mysterious, geographical, extremely rare, begins with C middle name?

What about S? (My real first name starts with S too..)

[snorgle] S's usually wear woolly jumpers in the summer and laugh a lot.

[snorgle] Bam Sally On Chin? Did anyone get your anagram? If not - what's the letter split, I'll try and guess it.

Bool] What about J's?

[BtD] See above for female J's. I don't find it works for males.