It's the right answer, Alia mentions it in Children of Dune.
Children of Dune wrote:Alia sniffed. Those women were as ignorant, as superstitious and backward as
the desert Fremen . . . just as that sneering aide had said, trying to curry
favor by reporting the dedication of the dance. And neither the aide nor the
Ixians even knew that Ix was merely a number in a forgotten language.
Ahhh - I see. So the aide and the Ixians had forgotten that - but the Bene Gesserit never forgot it, did they? My argument over there was that the Bene Gesserit, Leto II, Paul, (didn't include Alia, which was a silly mistake on my part) and anyone with Other Memory would never forget the roman numeral system, and it's obvious correlation with the ninth planet in the system... This seems to show that Alia knew it and scoffed at their ignorance...
"Originally Posted by Kelsennel
Or the differing stories between the prequel and Herberts. For instance House Vernius ruling IX in the prequels, and the IX Confederacy in Herberts books. If I remember correctly, the only remaining heir to IX was damn near killed and basically became a cyborg who couldn't possibly have children. Or the fact that IX is pronounced 'icks' because no one really remembers that IX was the roman numeral signifying that IX was the ninth planet in orbit around it's star."
"Originally Posted by grandmastercrafter
hehehe - this is all stuff that Kevin/Brian made up, poorly. Consider this: Other Memory would not have allowed every single Bene Gesserit, and Paul, and Leto II, to somehow 'forget' the roman numeral system and it's connection to a ninth planet in a solar system (they regularly talk about memories extending back to pre-spaceflight, in the original Dune series, so the idea of a collective memory loss like that is just ridiculous)."
"Originally Posted by TinyTony
The name being a forgotten roman numeral was from FH in Dune Messiah. Can't blame that one on Kevin/Brian. They just ran with FH's one line comment."
I'm going to have to eat some crow