The big twist in the Doctor Who 50th anniversary was that his home planet of Gallifrey was still out there.
Like the "real" Gallifrey, HD 106906 b is confusing and seemingly impossible.
Doctor Who is legendary, award-winning, record-breaking and global, and this planet deserves deserves something special and supernatural as its name. How better to honour its existence than by dubbing it the home planet of our beloved time-travelling alien, the Doctor.