They only want K-12 students to help, so talk to your younger friends, or the children of your younger friends, and get them to suggest “Rover McRoverface.”
You could also suggest “Wade” as in “Rover Wade”, if you want to see someone’s head explode:
NASA’s Mars 2020 rover is beginning to take shape. Earlier this month, crews installed some of its legs and six of its wheels. Now, the vehicle needs a name, and for that, NASA is turning to students. Beginning in fall 2019, NASA will run a nationwide “Name the Rover” contest open to K-12 students in the US. The spacecraft will need a name by July 2020, when it’s expected to launch.
The contest is part of NASA’s ongoing effort to engage the public in its Moon to Mars mission, which will search for signs of microbial life, characterize the planet’s climate and geology and pave the way for human exploration. If you’re not a K-12 student but want to get involved, NASA is also accepting applications to judge the contest submissions.