Flower Power (Nora + Ren) - The specifics are not known, but it is named as such because, as Jaune describes it, "Ren brings the flower, Nora brings the power."
Arkos (Jaune + Pyrrha) - Described as "that thing, when we take our shields...?" by Jaune. The name is a portmanteau of the pair's last names, Arc and Nikos.
Pomegrenade (Pyrrha + Nora) - The team attack was first revealed in RWBY: Amity Arena and is purely an in-game team attack. As its card info states: Jaune thought up of this team attack during the last second in order for them to fend off the Death Stalker that Jaune and Pyrrha come across in "Players and Pieces", wherein Pyrrha launches Nora upwards with her shield and thus, making Nora land on a designated area alongside Maginhild. After Pyrrha's passing, Jaune had to take her place.
The members of Team JNPR allude to characters who are said to have disguised themselves as the opposite gender in their original stories.
Achilles, upon whom Pyrrha is based, is said to have disguised himself as a red-haired girl, assuming the name Pyrrha upon doing so.
Hua Mulan, upon whom Lie Ren may be based, disguised herself as a man in order to serve in the army in place of her aging father.
JNPR (Juniper berries, blue) is a possible allusion to Rooster Teeth's other series, Red vs. Blue, when compared to their rival Team RWBY (Ruby, red gemstone).
Juniper bushes are also known to turn bright yellow, which helps to explain its connection to leader Jaune (as with Ruby to RWBY, Cardin to CRDL, and Coco to CFVY).
Team JNPR's members' fighting styles are based on archetypal warriors from a different culture: Jaune's is Frankish/Norman, Pyrrha's is Greco-Roman, Ren's is East Asian, and Nora's is Nordic.
On November 6th, 2014, Monty Oum discovered that he was allergic to juniper.
On The Staff Of Charon during Red Vs Blue Season 13 Episode 6, Team JNPR is one of the names scrolling on Hargrove's screen, along with RWBY.
Following Volume 3, the team has been referred to as Team JNR in merchandise and in DLC packs for RWBY: Grimm Eclipse. The title is presumably the internal name for the group and has been adapted by the fandom as the group's unofficial title, but has yet to be used in canon.