Historic Polish Trees are Now Named After The Witcher Characters The Witcher series. The trees in question are centuries-old, and Ostroleka's city council was looking for ways to have them seen as "natural monuments" so that they would be protected well into the future. According to Gaming Bible, the city's youth council came up with the idea of naming them after characters from The Witcher, as both a way to "raise their rank in the public awareness," and "to honour a world-famous work that brought fame to Polish culture and literature." Six of the trees are English oaks, while one is a common ash.