Blitzen.
the same names that they have
Donner is one of Santas reindeer, but not Bonner.
Blitzen
The reindeer named Donner. Thor was the Germanic peoples name for the god of thunder, translated as donder.
Reindeer can be seen unless you're talking about santas reindeers then no, they have special magic that makes them invisible.
Rudolf
Reindeer Road
Rudolph
Cupid is the reindeer that shares its name with the Roman god of love.
It's a sleigh (large sled) but don't think it has another name
dixon
Santa dosent have names for his elfs because there two many. santas reindeer have names.