1. Alia, Leto, and Ghanima Atreides were imbued with ancestral memories while in the womb. What were they called?
From Quiz Children of Dune
Answer:
Pre-born
When a member of the Bene Gesserit drank the poison called Water of Life, she became a Reverend Mother and gained access to their genetic memory. If a woman was under the influence of a large amount of spice while pregnant, the same effect would be passed on to her fetus. The fetus would become aware and have thousands of years of memories before they had a chance to form their own personality, which could be quite dangerous. Alia became a pre-born when her mother, Jessica, became a Reverend Mother. Ghanima and Leto were pre-born because Chani was on a high-spice treatment before she died in childbirth. Despite having more experience than everyone else around them, combined, these pre-born still looked like children, and were treated as such.