The Oxford Comma... and friends

I first heard of the Oxford comma on one of Dogberry's posts at Inky Fool. 

Punctuation named after places? Whatever next? Apparently it's the comma that you could (but may choose not to) put before the 'and' in a sentence list. 

As an example, here's what Simon Says at Writers Bureau had to say on the subject:

"I dedicate this book to my parents, Martin Amis and JK Rowling."
...it suggests that this author is the love child of Martin Amis and JK Rowling! ...To clarify the sentence, we need to insert the Oxford comma, before the word 'and', like so: "I dedicate this book to my parents, Martin Amis, and JK Rowling."

But why is it called the Oxford comma? And are there other geographically-related punctuation marks I should know about? 

The Papworth Colon - for colons which need to be removed forthwith

Stratford-upon-Avon Quotes - for extravagantly-phrased theatrical spouting

The Westward Ho! exclamation mark - to describe exclamation marks used for decorative effect (including a sub section for multiple exclamation marks at Christmas - or the Westward Ho! Ho! Ho!!!)

The St Martins Lane* Apostrophe - in response to the Grocer's Apostrophe, this is for apostrophes notable only by their absence.

The Wallasey Ellipsis - any ellipsis with the wrong number of dots, which disregard the laws of God and man (in Wallasey there are no less than three roundabouts where the usual rules do not apply)

I'm not sure who should get custody of the Question mark:

Watford? Hooton? Howarth? Wensleydale? Somewhere in the Wye Valley?... or perhaps Pendle – where the whiches come from?

*cackles*

If there are any punctuation marks associated with place names that any of you have made up know of, do tell!

* No one's too rich to need the occasional apostrophe

Related post: My 10 Punctuation Pet Hates