Common knowledge, it is, that Yoda's species, its homeworld, name etc. are never mentioned in Star Wars media. In the films, we only ever see two of their kind, Yoda himself and Yaddle. As far as I know, even in the books, or in video games when others appear, they never disclose any information about their kind.
In-universe however, is there any evidence that members of Yoda's species are deliberately withholding this information from others, or is just merely hidden from us viewers / readers? I'm happy to take answers from Legends or Canon.