Names of Rivers:Etymology

I found this on the quagga nanna8
qwag.org.uk/river-quaggy/

My DH has a fascination for old maps we have a lot of them. They are very interesting and show the old names of towns cities and rivers and waterways.
Our river is the Mersey it’s name is Anglo- Saxon apparently Maeres- ea meaning border river. The border being between the kingdoms of Mercia and Northumbria. Such an interesting subject history and the old names I find fascinating.

I've often wondered how the river Teign got it's name and still have no idea, and why is it spelled like that, I wonder?

Not quite the same, but pubs were always used as common points of direction, if you go back far enough.
Therefore I hate it when the names are changed. It's a break from their past use.

I’m fond of the river Ouse.

A triumph of onomatopoeia 😬

We live close to the Danelaw border- so geographical names jump from Danish origin, to Saxon, or Roman. Once you know, it is easy to recognise.

I like names too, of places with the meaning in two or more languages. Like Houghton-on-the-Hill. High town - and then 'on the hill' - same meaning twice.

All the names ending in 'by' are Danish, same as those in 'thorpe' - but 'ton' is anglo-saxon.

Place names in general interest me. So much history attached. The river near our house was known as Belisama by the Romans and revered as a Celtic goddess.

I always walk down and greet her when the year turns.

We live on the River Otter and I had always assumed that was from the creatures we see swimming in it. As it turns out, the word "otter" apparently comes from old English and just means "water". River Water!

Avon is from the Celtic for river so not only Welsh.

I once read (somewhere so sorry I can't provide evidence) that the oldest river name in the UK is the Humber. I remember them saying that it came from the pre-Celtic language 'hu...mb...r. It means something like good wet. It stuck in my mind because the Humber is one of my local rivers.

The River Severn was once called Sabrina by the Romans after the water nymph who lived there according to old celtic legends.
The Welsh call it Hafren and in saxon times it was known as Saefern.
I rather like the name Sabrina.

I was at school near the River Quaggy in London . I always wondered where the name came from.

Yes, I am interested in the names of British Rivers. Many of them are I think, are anglicized versions of old Celtic names. I believe that the River Thames is one. One that is definitely Welsh is the River Avon . Avon (pronounced Afon in Welsh) is the Welsh for River. So linguistically the meaning of the River Avon is river river.
I have always been struck by the number of quite long rivers in South Wales that start with the letter T. Tawe, Teifi, Towy and Taf. But I don't know the answer to this unfortunately.

I've always been interested in words as such, names of places and rivers are a part of this for me.

My nearest river is the Trent, and its name may mean that it is prone to flooding. Apparently, it also divides the north from the south of England.

Me. I’m interested 😁

I am interested in the etymology of all geographical names, not just rivers. And how different waves of immigration influenced that.