Thread:Juraj103/@comment-27075564-20170514221207/@comment-24448826-20170521162716

Well, I do know a lot about everything witcherverse, to some degree. I looked into it, as you asked and, indeed, found some errors so here you go:
 * 1. Riannon was not a daughter of Shiadhal, but her granddaughter. In fact, her parents were Lara Dorren and human Cregennan of Lod and later when both of them died Cerro, queen of Redania, took Riannon in. Shiadhal was a mother of Lara Dorren with a father being Auberon Muircetach.
 * 2. Muriel was not married to County de Ruyter but Count de Ruyter. He does not have an article but is full canon and if you have time you can add the article yourself :) here is the only source of info on the man (Polish only unfortunately): http://web.archive.org/web/19991115115432/http://sapkowski.fantasy.art.pl:80/wc/ciri/muriel.html.po
 * 3. Crach an Craite, at least according to The Tower of the Swallow had two wives, with one being apparently unable to give him a child.
 * 4. Cirra of Cintra that married Radovid II was daughter of Correl not Coram. It says so in genealogies from Sapkowski. Mistake made both on wiki and on the in game tree. "Królewna Cintry, córka króla CORRELA (vide „Dynastia cintryjska”). Pra-pra-pra-pra-prababka Ciri. Dzieci (w kolejności urodzin): syn CORAM, król Cintry jako Coram I; syn Ceran, poślubił Impeccę, córkę króla Lyrii Egona, został królem Lyrii; córka: CIRRA, zaślubiona królowi Redanii RADOWIDOWI II ŻEGLARZOWI." This is also wrong in articles but, alas, I have very little time so I can not fix it.

That is all I could find. ANSWER TO EDIT: I am sorry but I will have to let you down on this matter since I only ever done small family trees, not at all so complex ones like that you are doing one. However, SMiki55 might know a thing or two since he done a research a while back. I dunno how far he got though. PS: Which version of the Official Prima Guide you have? GOTY or 2015 edition?