Trying to Make Sequential Planet Names

[ShinnyMetal]

I'm trying to make a custom name list and just putting the following in but it didn't yield anything:
planet_names = {

generic = {
sequential_name = "Planet %0%"
}
......
}

also tried to rummage around to see how galaxy generation does planet names for star systems (since having roman numerals would be cooler) but I didn't notice anything.

Anyone have ideas?

 

[Dibujor]

Sequential naming doesn't work for planets unfortunately