Where does “Existentialistin” come from?

Existentialistin (German) comes from German existentialist, from French existentialiste, from French -iste, from Latin -ista, from Ancient Greek -ιστής, from Ancient Greek -τής, from Proto-Hellenic -tās.

Ancestry of “Existentialistin”, step by step

StepLanguageWordMeaning
1Germanexistentialistexistentialist
2Frenchexistentialisteexistentialist
3French-iste-ist; -istic
4Latin-ista-ist; one who practises or believes
5Ancient Greek-ιστήςAlternative form of -τής; -ist
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Proto-Hellenic-tās
Every word from Proto-Hellenic -tāsEvery word from Ancient Greek -τήςEvery word from French -iste