Ethnologically
The Century Dictionary and Cyclopedia
As regards race or nationality; according to or in accordance with the methods or principles of ethnology.
the GNU version of the Collaborative International Dictionary of English
adverb.
In an ethnological manner; by ethnological classification.
Wiktionary, Creative Commons Attribution/Share-Alike License
adverb.
In an
ethnological
manner or fashion.
Word Usage
"Firstly for the object of this response; we will label the citizens of FYROM as Serbo-Bulgar pseudo-Macedonian Slavs - historically and ethnologically, that is exactly what they are - there is no such a race or language as Macedonian."