According to news reports, Hyundai believed Avera was too similar to the company's Azera nameplate. Hyundai filed suit against the new company in November of last year.
The new name pays homage to the Indian River, which flows through Rivian's home town of Brevard County, Florida.
Perhaps more interesting is that the automaker has begun the first road tests of the prototype we saw teased so long ago. Supposedly, the vehicle has been out and about in the Sunshine state for a while now. Let us know if you've seen anything odd on the roads around Rockledge, Florida.
[Sources: Rivian Motors, FloridaToday]