After looking for I found all the pups names.
They are
Aleu
Kodi
Saba
Yukon
Dingo
Nunivat
If you want to see which is which go to this site http://www.freewebs.com/harli_b/harlibalto.htm

there are six pups but only four pups have names Alue,kodi,dingo, and
saba.

Official Names:
-Aleu
-Kodi
-Saba
-Dingo
The other two pups, more commonly known as the redfaced pup and the
red Aleu twin, have no official name, so you can decide what it is
Hope that helped

Like everyone said, they are "Name-less" all you can do with them is
to make a fan caracter out of them. Meaning YOU can create the name,
gender, personality, ect....... but it's NOT official.

Try looking at a vaiety of art/image/fanfic galleries, everyonne or
some people have their OWN creation of the "Aleu-twin" and "the
red-faced" pup.

Everybody created different names for them.
Here is one version
of them.
http://baltosource.timduru.org [...] s_icon/2-1-177-46.html&st&st36
There are many other versions
as well.

well, in Balto 2 we know only four name, Aleu, Kodi, Dingo and Saba
(the pup that asked at Balto if the humans take him too) but for the
others two there are a lot of names, the most famous are Cats version:
the red masked pup is Kiona and Aleu's red twin is Dakota. But
everyone here have a personal names for them^^