@That Strange Fella Nah, reread again. She didn't know the prince's name in the fairytale, which was why she was doing extra research to find the og!prince (ch3-4). She only knew the og!prince was tall, with black hair, and suspected he was single and young bc of storytelling logic.
She only chose to look for Fabian bc he was the only unmarried young man in the Grand Duke's line, which meant he could be called a prince if he was the GD (all other princes were old and married with kids).
Idky the book didn't show the other kid as also being an unmarried man in the GD's line tho, but maybe he wasn't put in the lineage book bc he only just came of age that year?
She only chose to look for Fabian bc he was the only unmarried young man in the Grand Duke's line, which meant he could be called a prince if he was the GD (all other princes were old and married with kids).
Idky the book didn't show the other kid as also being an unmarried man in the GD's line tho, but maybe he wasn't put in the lineage book bc he only just came of age that year?