Yeah: and none for Wales. There's a database (https://historical-boundaries-of-wales-rcahmw.hub.arcgis.com...), but I've never ever seen or heard anyone using this information to make land acknowledgements, nor can I find examples online. The last major genocide in Wales, to my knowledge, was over a thousand years ago: none of the cultures involved still exist in any meaningful form. The closest we have in modern times is events like Boddi Tryweryn (the 1965 destruction of Capel Celyn), and everybody knows about those.

You can't just take a cultural practice (land acknowledgements) from one part of the world (Abya Yala, Ahitereiria, Aotearoa, Te Waipounamu), and copy-paste it onto a different part of the world (Wales), and expect it to have the same significance. That's cultural appropriation, and it is frowned upon: by reducing the significance of an act to empty symbology and meaningless facade, you do harm in the trappings of a revolutionary activism intended, by its actual practitioners, to reduce and mitigate harm.

Ironically, I'm right now appropriating the vocabulary of those activists – probably incorrectly – in order to try to win an argument with no real significance, on a forum run by Venture Capital. But this isn't a particularly harmful thing for me to be doing (except perhaps to my reputation: what if the children call me cringe?), so I think it's alright.