I certainly can't tell how they get the current pronunciation out of Wotton, but that's fairly normal with place names. :-)

They seem to have been a fairly mobile bunch, within limits - Oldbury on Severn, Thornbury, Coaley (nr Cam) and Minchinhampton, winding up in Woodchester - and the other side of that family from Berkeley and Slimbrige, not to mention the gg-grandfather's brother who wound up as the game keeper at Westonbirt. No one in Wotton-under-edge, that I've found yet, though.

And no, we've had no news of the previous bag - it's still an unsolved mystery, probably because there aren't any adventurous children around to run rings around the police. ;-)