Alright, firstly, what kind of setting is the kingdom in? Does it snow a lot, or is it a very fertile plain?
Because most kings either name their kingdoms after themselves, or they name them as something they wish them to be. For example, if the king wishes it to be prosperous for eternity, then he’ll name it that, just in another language to make it sound cool of course. You can use translators to help you with that. That way, people can google the internet and realise it actually has a meaning, not just a random name.
For translating it to other languages, I’d recommend Latin, Greek or something similar, then use the English pronunciation for those words to make your kingdom name.
Hope this helps!