Earlier this week, The Witcher devs confirmed what was previously only suspected – the mysterious medallion half hidden and buried in the snow in CD Projekt Red’s recent Witcher announcement is indeed that of a Lynx.
However, before this confirmation, the School of the Lynx only ever existed in fan fiction. But it would now appear that CDPR was inspired by its Witcher community, and as a result is building this new school into its video game series.
Source: Eurogamer How The Witcher's School of the Lynx fan authors came up with new lore