assuming that's how it works and what he wants (or her)Which is indeed precisely the purpose of it all. It's us playing wingman for Ranald by building a peace offering to his mother-in-law. Mathilde naturally has her own reasons for wanting the library (quite Verenan reasons, at that), but making it this shape means Ranald can sign his name on it while also having complete plausible deniability, thanks to the library name and the Agrurhun symbolism. With some luck, we can get Verena invested in a project that Ranald can use his domains to aid, thereby improving Verena's opinion of him.
the southern pantheon has a good thing going with their narrative and mythology of the mother, the father, the two daughters and a rouge.
compared to the situation up north with Uric and the Kislav gods.
why change it?