Ethnonyms as given names

[FeederOfRavens]

tysk(German in Norse)
Fries(Frsian)

[Beit El]

Popular Dutch and German name for girls: 'Saskia', meaning 'female Saxon'.

[blogen]

I believe that is derived from Slavic languages calling Germans by the Slavic word for them, Nemtzi.

Yes. For example South-Slavic origin in the Hungarian language (német): nemac = person with an incomprehensible language, basically the Greek "barbarian" word is the good analogy onto this.

[Rudel]

* From "German":
- Germain (fr), Germano (it/es), Dieter (de), what else?
Russian Gherman is a derivate of German or Herrmann?

I'm fairly sure it derives from germanus, ie "cousin", "parent".

[D´Sanglard]

Jean( french), John(english), Johannes( German), Giovani( italian), Juan( Spanish) and João( Portuguese)

Pierre( French), Peter( German), Peter( English), Pietro( Italian), Pedro( Spanish) and Pedro( Portuguese)

Henri( French), Heinrich( German), Henry(English), Enrico( Italian), Enrique,(Spanish) and Henrique(, Portuguese)

[Mikula]

Judith, Judita = Jewess

[Valmont]

* "Frank" and "French" are by far the most productive :
- François, Franz, Francesco, Francisco, Francis, Frances etc.
- Françoise, France, Francette, Francine
- Frank, Franco, Franjo, Ferenc etc.

Technically technically those names derive from the Germanic word "frank" which means "free".

[Nikomahos]

There are Greeks from Anatolia, Cyprus with the surname Hellenas=Greek.

[Mikula]

There are Greeks from Anatolia, Cyprus with the surname Hellenas=Greek.

Firstnames Anatol, Anatoliy - does it means man from Anatolia?

[Nikomahos]

Firstnames Anatol, Anatoliy - does it means man from Anatolia?

Anatol and Anatoliy do come from the word Anatolia. In Greek it would be Anatolitis for males, Anatolitissa for females.