The other trains have already been named by the public: one is named Estelle, after the five-year-old daughter of Sweden's Princess Victoria, the next in line to the Swedish throne.
A Swedish rail operator has bowed to public opinion and named a train "Trainy McTrainface", after the suggestion topped an online poll with 49% of the vote.
The train company said it hoped the name Trainy would "be received with joy by many, not only in Sweden". The vote for the fourth and last train name begins next week.
A public vote to name four trains running between the Swedish cities of Stockholm and Gothenburg has expectedly resulted in at least one hilarious name.
Now explore Hogwarts curriculum with two new "Harry Potter" books
Rowling, " Harry Potter and the Deathly Hallows " during a fans day at The Carriage Works on July 21, 2007 in Sydney, Australia. Rowling, illustrations from Jim Kay and artefacts that have been magically released from the archives at the British Library .
Other members of the fleet are named Estelle and Glenn.
"There was a bit of worldwide attention on the vote, and I imagine that some people were quite delighted to get some revenge for the Boaty McBoatface thing", Mr Nafsi admits. The most frequent proposal by far was Trainy McTrainface, a reference to Boaty McBoatface.
The name Boaty McBoatface was instead given to a remotely operated submarine aboard the polar research ship.
As a consolatory gesture, the research ship's remotely operated undersea vehicle, created to collect samples from the deep waters of the Arctic and Antarctic, will be named Boaty McBoatface, the government said.