Where does “Մերձդնեստր” come from?

Մերձդնեստր (Armenian) comes from Armenian մերձ, from Old Armenian մերձ, from Old Armenian -ան, from Proto-Indo-European -nós — Creates verbal adjectives from roots.

Ancestry of “Մերձդնեստր”, step by step

Step	Language	Word	Meaning
1	Armenian	մերձ	near, close
2	Old Armenian	մերձ	near, nigh, next, close to, contiguous; near,...
3	Old Armenian	-ան	found mainly in nouns; instrument-suffix;...
4	Proto-Indo-European	-nós	Creates verbal adjectives from roots

Every word from Proto-Indo-European -nós →

Մերձդնեստր — Etymology, Origin & Word History | Etymology Explorer