In answer to an email (below), an attempt was made to gather bits from google and elsewhere on where the Wedlock name was located, and ultimately came from, and what its meaning is. Do you have more info.?

http://genealogy.familyeducation.com/surname-origin/woodlock...
I recall from my own searches that the location of most Wedlocks in recent history (say, last 400 years) were based in Cornwall, in particular towns. From there they branched out to England, Ireland, the Americas, is what I saw...however, actual surname history sites have much more precise info. that varies. Here's one:


(Wedlock is everywhere mentioned in name derivation sites as a variant of Woodlock:)

Woodlock


Last name origins & meanings:

1. Irish and French: originally English, from an Old English personalname, WudlÇc, composed of the elements wudu ‘wood’ + lÇc ‘play’, ‘sport’.
2. The name Woodlock or Wodelock was taken to Ireland as early as 1172 by the brothers Torsten and Reginaldus Utlag, the sons of a Wiltshire, England, landowner named Wudulach. Their descendants held large estates in Tipperary and Co. Dublin until, in the 18th century, they suffered greatly from the restrictions placed on Catholics, and several members of the family emigrated to France and Spain, and in the 19th century to Canada, the U.S., Australia, and New Zealand.


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Let Me find another one or two, for comparison...

Meanwhile, you might like to check out this exchange from a couple of years ago:
http://boards.ancestry.com/surnames.wedlock/43/mb.ashx

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And you might like to put your query here, too--the only Wedlock msg board I know of (rootsweb doesn't have one for this name):
http://boards.ancestry.com/surnames.wedlock/mb.ashx

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This commercial family history site is useful for showing the crest, and also giving all the variations of the name Wedlock:
http://www.houseofnames.com/xq/asp.fc/qx/wedlock-family-cres...

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From an older book, online, at google:
http://books.google.com/books?id=00cBAAAAQAAJ&pg=PA375&a...

If you can't get in with that long address, it says briefly that Wedlock is the same as Wedlake; and the two names are from an Old German personal name, Widolaic.

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Entering "Widolaic," I got another out of print book at google, which says author finds "no trace of this name ("Wedlake, Wedlock") on English soil"
http://books.google.com/books?id=RbkEAAAAIAAJ&pg=PA798&a...

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Ferguson himself, on Widolaic meanings:
http://books.google.com/books?id=RbkEAAAAIAAJ&pg=PA798&a...

...and further:
http://books.google.com/books?id=P7NrAAAAMAAJ&pg=PA131&a...

This one's lovely:
http://books.google.com/books?id=fGUUAAAAYAAJ&pg=PA224&a...


Of course, you're more interested in where the name was located in the British Isles, whereas I see I am leaning more towards what the name originally meant.

Well, in case this gives you some leads to follow up on Google, there's lots more.

Have a good trip,
kc

ps I will also post this on that Wedlock msg board I listed, above--you might check there to see what other Wedlocks have to say on your question.

His email today, which the above tried to answer:
Dear Madam
I came across some posts in 2005 and 2006 on a website 'tiscali.ancestry.co.uk' from you about the surname 'Wedlock' and its origins and wondered how the correspondence finished and what you were able to establish. I am going next week to meet a Crawford Wedlock who lives in Co Antrim whom I have not seen for about 60 years. My feeling is that the name is Scottish, not Irish, in origin. The 'Irish' Wedlocks would have emigrated from Scotland in the 16th or 17th centuries. Nor do I think that there is any connection with the name Woodlock, which is probably English and not a mis-spelling of Wedlock. However I would bow to your greater expertise, if I were to see the evidence.
Henry Gordon