Dasher
Dancer
Donner
Dasher, Dancer and Donner.
Donner, Dasher, and Dancer.
DonnerDixonDancer
Vixen
Cupid and Comet
The ecology pioneer whose last name begins with Mu is John Muir.
One of the reindeers in the poem is Blitzen.
hagiai
cannonball adderly
cranescuckooscrows
There isn't a Harry Potter character whose name begins with Gan.
Ugli fruit begins with the letter "U".
Elmur Fudd.
Alvin