It's the same as in English. Ariel, like all other proper nouns, is intended for use in the language in which it was coined. There is no one-to-one correlation between this name -- or any other -- in English and German.
The mermaid? Her name is just Ariel. Possibly Ariel Triton
Ariel Scheinermann is Ariel Sharon's birth name.
Names are the same in German.
The mermaid? Her name is just Ariel. Possibly Ariel Triton
Ariel Sharon's birth name is Ariel Scheinerman.
The mermaid? Her name is just Ariel. Possibly Ariel Triton
The name Ariel, in Isreal.
Ariel Rot's birth name is Ariel Rotemberg Rot.
Ariel Winter's birth name is Ariel Winter Workman.
Ariel Adler's birth name is Ariel Jacob Adler.
Ariel Ashbel's birth name is Ariel Efraim Ashbel.
Ariel Rad's birth name is Ariel Niroomand Rad.