Edit:never mind I have stand corrected and I have more research on the ruin quartet
and to answer the question its not based on a moose but it definitely looks like one
But ting-lu is based on taotie one of the 4 perils of chinese mythology
Its depicted to be an animal with a ding(the vessel it has on the head)
Name Based on
Ting:i dont know I just guessed the first time
Lu:Chinese word for deer and possibly a shorter version for lutetium(rare earth element)
im gonna be honest I dont know why its a ground type but the lutetium is a funny coincidence