rvk - Sephardic ancestry?

I don't know. which test did you do, at or mt?

The test just confirms family traditions but I'm wondering if you know any names of our common ancestors who are known to be Sephardic.

If you don't mind me putting in my two cents, all the surnames you mention are German or (possibly) Polish, except for Charlevil. It's likely from the city of Charleville, France. See https://en.wikipedia.org/wiki/Charleville-M%C3%A9zi%C3%A8res.

Yes, those names are Dutch-ified but many cousins' names are Sephardic. My family was in Amsterdam from the 1500's and my understanding is that Jews there at that time were Sephardic.

Please see Yaacov Drukker
Jacob Drukker was born around 1550 and he was the first Drukker in the Netherlands.
His parents came from Portugal or Spain according to what my dad told me.
Regards

what's the source of this info on Drukker?

The manager of the profile of jacob Drukker is Bernard Fresco. Please ask him

Drukker in Dutch means printer
In the 15th century there were Jewish printers in Amsterdam

Acc to quite a few sources
Menasseh ben Yossef ben Israel
was the first Jewish printer in Amsterdam.