Which Germanic Folk Has Preserved Most Heathen Tradition?

[Theunissen]

Well, just using the word Ostern is better from a preservation point of view than the Norwegian Påske (though I think she wasn't worshipped in Scandinavia, in which case it would be silly to expect the Scandinavians to preserve her name in the feast — they never would have had it in the first place).

You mean Ostara? There is some question whether she was made up in the 19th century, at least in the form popular then.
As for Germanic or Celtic traditions. What makes them fade away isn't other conventional religions, but simply the modern day individualist life-styles with state-sponsored education and a cultural industry that shifted the focus on Hollywood or music industry productions. And then there is the induced resentment against anything traditionally European or Western. Not to mention the generation gap that has been created.

[Wychaert]

Theunissen,
Ostara, Eostre and Easter, have Germanic and even celtic origins.
Rather than the Dutch Pasen, which isn't even volkish in the slightest. Hell, I even propose the name honkiebonk(I'd just make that one up, no worries, this word doesn't exist ) rather than Pasen(pesach)....

[Aelfgar]

My paternal grandmother's maiden name is derived from the Aesir, an Anglo-Saxon one to boot. Any name like Oswald, Osric or Osbald, like Oswiu, all share this root. Oswiu knows this, of course. My paternal grandfather's surname is derived from Freyr, in the Danelaw.

I have the surname Ingram in my ancestry, which appears to be directly derived from Angle.

[Rodskarl Dubhgall]

I have the surname Ingram in my ancestry, which appears to be directly derived from Angle.

https://www.ancestry.com/name-origin?surname=ingram

"Ing Raven"

Used to work with a bloke carrying that surname.

Ancestry uses Oxford for their source and it is mostly correct.