What are the names of animals?
A American Alligator
N Nanny Goat
U Ulysses Butterfly
X X-Ray Tetra (fish)
Y Yellow Jacket
Well, i believe God gave Adam the names for the animals. The biblical and scientific answers to this question are the same: man gave names to all the animals. To be specific, the bible says Adam named all the animals (Genesis 2:20). Science tell us that, over time, as humans encountered different animals, they gave them names so as to identify them to each other.
This is an impossible question to answer, as there are millions of animals in the world, and a lot of their names are unpronounceable, as they were discovered in other countries and so have native names. In fact, scientists are still discovering new animals in the world, so this answer would have to be updated every week or so.
Scientific names are important for two reasons. (1) There are so many species of animals in the world that scientific names are the one unique name for that one unique species and (2) through scientific names, you can see how the different species of animals are related. Black squirrels and red squirrels aren't the same species, but they're related and their scientific names reflect this.