Rockbreaker keeps its name when tamed now.
Could not find
Doom,
Grenich,
Grond, or
Justice. There is no indication on wowhead as to how or when they spawn.
Could not find
Hive Eater Matriarch as there is no indication on Wowhead as to how or where she spawns.
Chompy keeps its name when tamed now.
Deifir the Untamed keeps its name when tamed now.
Could not find
Izik the Dissolver. There is no indication on Wowhead as to how or when it spawns.
Lil' Red keeps its name when tamed now.
Goldie keeps its name when tamed now.
Korthos keeps its name when tamed now.
Magoo keeps its name when tamed now.
Mara keeps its name when tamed now.
Rose keeps its name when tamed now.
Scout keeps its name when tamed now.
Gruesh keeps its name when tamed now.
Makatau keeps its name when tamed now.
Could not find
Milo or
Spitz. There is no indication on wowhead as to how or when they spawn.
Gutgut keeps its name when tamed now.
Gnarl keeps its name when tamed now.
Snarl keeps its name when tamed now.
Chibee keeps its name when tamed now. Also now available without inching in and out of the area for the right phase.
Rakira keeps its name when tamed now.
Ro'shen keeps its name when tamed now.
I am not able to find
Ruukti due to requiring completion of the Jade Forest storyline. I'm 2/12 chapters. NOPE.
I keep accidentally killing
Hutia. I don't have low levels to try here.
Zhing keeps its name when tamed now.
I was unable to find
Bristlespine and
Stompy.
I cannot check
Yachi or
Yao due to having completed their quest.
I did not try
Gumi or
Degu due to the worries present with Hutia.
Pengsong keeps its name when tamed now.
Feverbite keeps its name when tamed now.
I did not try the rest of the challenge tames of Pandaria.
Tyrantus keeps its name when tamed now.
Ghaz'an keeps its name when tamed now, and counts as defeating it for dungeon completion.
Markaru keeps its name when tamed now.
The Black Stalker keeps its name when tamed now, and counts as defeating it for dungeon completion.
Deathskittter keeps its name when tamed now.
Blacksting keeps its name when tamed now.
Feng keeps its name when tamed now.
Ripp keeps its name when tamed now.
My endless hunt for a way to tame
Pink Elekk has failed yet again.
I'm done searching for retained names for now. That's 26 more confirmed beasts that retain their name on the PTR. I've updated the first post.