Thanks @FayCarew , you're right, Huw is quite outdated, and even Hugh, isn't the most popular these days in the UK.
Huw/ Hugh was used a lot 25-30 yrs ago, and it's had it's literal ups and downs, like a mountain range on the graph, but is in the down-swing at this time.
Your name source is a good one, new to me, I was looking at some others but, mainly I got the idea that Hugh was having a bit of a resurgence from a few PPs that seemed to like it, which surprised me actually.
Hugo ranks among the top 100 in many countries in Europe, not so much elsewhere.
Top four names in NA for 2024 are: Noah, Liam, Oliver and Elijah.
Hugo doesn't make the cut.
Thanks for the darkgreener site name, it's very different from ones I've seen.