Before I moved further south after experiencing Normandy I had always thought that Rodez, in the Aveyron was a town in Spain. It sounded ‘Spanish’ to me !
I had always believed, before I went to sea that Durban was in India , the name conjured up ‘turban’. Ironically it turned up to be a city I was to visit dozens of times during my seafaring days.
I also believed, when I was young that Fiat, the car company was called ‘FLAT’…
but then again I always was a bit dullaly….
We all have misconceptions, often because the ‘obvious’ connections we make aren’t based in reality. I’m pretty sure the France and Netherlands that I thought existed when a child, were only present in posters advertising cheese.
With a surname like yours, I think you should be allowed the occasional flight of fantasy. 
They are only tweets.
I was a very stupid ignorant little girl and thought Beirut and Bayreuth were the same place and found it hard to reconcile my parents’ friends simultaneously being bombed and going to the opera.
Dodo, springs more to mind !
When I was a little kid growing up in Fairbanks Alaska, the radio kept mentining Vietnam. I always thought they were talking about Nome, Alaska.
Also because of my Grandad for many years I thought Ticks jumped off of trees…
Oh and I thought until just a few years ago that the Bee Gees were Australian!
Our daughter still refers to the newel post as “mule post”… something which we blame on her childhood love for old cowboy films where the mules/horses will be tethered to a post to stop 'em wandering while the rider goes into the saloon… hic
She’d hear me say something like “just hang it over the mule post” and it made perfect sense to her… 
Apparently you weren’t the first to make that mistake, in the book Great Operatic Disasters, there’s an account of a Bayreuth performance of Siegfried, where a dragon was designed consisting of three parts (body, neck, head), that were produced by different companies in the UK. Unfortunately, the neck was accidentally sent to Beirut. The result was Siegfried fighting a dragon without a neck, appearing much smaller than intended.
Well that’s a forgiveable one - they did spend quite a few years in Australia:
The Bee Gees were born on the Isle of Man (a British Crown dependency) to English parents and raised in Chorlton, Manchester, England. They emigrated to Brisbane, Australia, in the late 1950s, where they began their music career, before returning to the UK in 1967 to achieve international stardom.