Poland: Rumcajs (actually Czech but still popular here), Miś uszatek, Pszczółka maja (Maya the bee), Koziołek matołek, Plastuś

If you use a VPN to Poland you can probably watch https://vod.tvp.pl/dla-dzieci (see the "retro kraina" section)

UK- postman pat, rupert bear, family ness, bananaman, bob the builder, the hurricanes, thomas the tank engine, captain pugwash

It should be noted that in the UK we have the superior Dennis the Menace

I can't say for certain, but the US one is probably a Christo-fascist.

Does stop motion count?

John Dillermand from Denmark

Ha this is cool! Please add Pippi Longstocking/Pippi Långstrump to swedish ones :)

Belgium is an exceptionally big country in terms of comics, ranging all ages and a lot of styles

https://en.m.wikipedia.org/wiki/Belgian_comics

Italy also has Dylan Dog

The list is missing Pat and Mat for Czechia. Which is a terrible overlook, because that cartoon is hilarious.

For Poland Reksio and probably a lot of others, but that's not a big deal.

Belgium has also Tintin. I would argue its better overall and represents better Belgium than the cowboy.

Croatia: Little Flying Bears (Leteći Medvjedići) which is a combined effort of Croatian and Canadian animators.

Are you looking for animations only or are comics and childrens' book characters also welcome?

Belgium - Spirou & Fantasio, The Smurfs

Italy - Corto Maltese

Germany - The Little Sandman (Unsere Sandmännchen)

Sweden - Peter-No-Tail

Croatia - Profesor Baltazar (eng. Professor Balthazar)

It aired from 1967 until 1978.

Germany also has Werner and das kleine Arschloch.

The Marsupilami should probably be on the list for Belgium too.

Also, not sure if you just want animated ones or comics too but Franka and Yoko Tsuno are some comic book characters of European origin too.

Not really a character focus on these, but the book of kells, song of the sea, and wolfwalkers are Irish made movies, based on Celtic myth, with fantastic animation.

Also this might help

https://en.m.wikipedia.org/wiki/Category:Children%27s_animated_television_series_by_country

France: les Shadoks. I don't know if it has been published outside of France but that's an amazing piece of animation from the 60's.

If you want to include CGI Latvia is going through a Flow-mania after winning the Oscars. I would be surprised if they don't have merchandise for it already.

I can only think of oldies for Hungary: The rabbit with checkered ears, Frakk, Pom pom, etc.

Slovenia has Medved Bojan. Cannot really think of any others

France: OuiOui, Barbapapas

Netherlands: Miffy

Switzerland: Titeuf

For Hungary there is also the Mézga family, Szaffi, the King Matthias series and Magyar Népmesék, also Ludas Matyi

Isn't Xilam french? If that's the case, there is a lot to add there.

Also for italy there is mio mao,if you count claymation as animation.

I know France already has a lot, but maybe Yugo from Wakfu, just to also have something a bit more recent ?

For Italy, there's also La Linea , a good old classic. Also, La Gabbianella e il Cato ("The Seagul and the Cat", or "Lucky and Zorba" in tbe English version) was a great Italian animated movie.

Then there's also "L'enfant qui Voulait Être in Ours"/"Drengen der ville gøre det umulige", a great Franco-Danish animated movie. But as a French, I think we can let the Dans take this w, we already have a lot. It wasn't distributed in any country but these two as far as I know, but in English the name would be " The Child Who Wanted to Be a Bear".

[Edit: I remembered I had a book about the history of animation somewhere and figured it might have something to fill the blanks. Bulgaria had a few influenial animation artists like Donio Donev with "The Three Fools" PenchoKoutchnevv witg "The Blue Eyed Moon" and "The Little Girl, The Cat and the Clock".Vesselaa Dancheva with " Anna Blume" Moldovahads Natalia Bodiul with "Letnistsa" ("The Stairway")

Belarus had "Posledny" ("The Last") by Alexandre Cheoetov

Albania had "Nine Years, Nine Days" by Artur Dauti. I haven't seen any of these movies yet tho, I might whenever I get the time. ]