There are only three New Brunswicks in the world, one Canadian Province (American: state, European: Country) - the default Wiki match for "New Brunswick"[0], and two American towns (56k New Jersey, and an unrecorded number in Indiana).
There are many places called Brunswick[1]. Brunswick is indeed from Germany, in honour of George III established in 1784[2]. Yes, your town of forked river/Gifle has a street name origin for the same reason, but it wasn't complete until at least 60 years later, and was originally named New France Street[3].
Bit of a miss on Whitchurch, ringing in with only 14[4] uses in the world, while Newtown[5] can be found 80 in places, excluding variants like Sturminster just down the road from you[6].
Mr Big Bang ... Whitchurch has rather a lot of spellings. Also, relying on WP for all your references rarely works well.
My reference to Whitchurch was UK exclusive in context but there are quite a few in AUS, NZ, CA, US, SA and others.
I'm not sure why you conflate Sturmister Newton with a bog standard Newton. You'll be calling Newton Abbot a Newton next (I went to school there for a while). We have Newtons and Newhams and that pouring out all over the place here but they are largely unremarkable in this discussion because it is effectively a suffix or prefix associated with the real moniker. Sturminster -, - Abbot etc.
On the other hand a White Church generally is just that - a white church. However, some if not most are associated with wit as in wise and not the colour white. Also Church might be Kirk (Scotland) or Chapel (Welsh) and a lot of other spellings too.
I appreciate your research on WP but I think reality is a bit more complicated.
In Germany: US state = (federal) state (No wonder). No provinces :-) Also in German, province directly (mis-)translated to "Provinz" is a little bit of an insult.
There are many places called Brunswick[1]. Brunswick is indeed from Germany, in honour of George III established in 1784[2]. Yes, your town of forked river/Gifle has a street name origin for the same reason, but it wasn't complete until at least 60 years later, and was originally named New France Street[3].
Bit of a miss on Whitchurch, ringing in with only 14[4] uses in the world, while Newtown[5] can be found 80 in places, excluding variants like Sturminster just down the road from you[6].
[0]: https://en.wikipedia.org/wiki/New_Brunswick [1]: https://en.wikipedia.org/wiki/Brunswick [2]: https://natural-resources.canada.ca/earth-sciences/geography... [3]: http://www.yeovilhistory.info/brunswick-street.htm [4]: https://en.wikipedia.org/wiki/Whitchurch [5]: https://en.wikipedia.org/wiki/Newtown [6]: https://en.wikipedia.org/wiki/Sturminster_Newton