Not to mention, Pomegranate in Spanish is Granada, literally Grenade. It’s also one of the more famous regions in Spain, and it exports a lot of that fruit, which, as is usually the csse, has both Spanish and Portuguese on the labels to reduce costs.
No one in Portugal should jump to that conclusion unless they are ridiculously xenophobic.
Messiah was actually part of the first dune in the original design, although Herbert later splitted it.
Children is something else, even if it shares the characters, it’s very much a setup for God Emperor. It has very different themes and style. Same with Heretics.
IMHO Dune is better seen as three duologies: Dune+Messiah, Children+God Emperor and Heretics and Chapterhouse.