Also known as Ye with macron
буква расширенной кириллицы
In the Vinony graph
Within Vinony's link graph, Е̄ is referenced by 281 other articles, and connects out to Я, Cyrillic script and yus.
Vinony files it under Cyrillic letters with diacritics and Letters with macron.
Its subject is documented across 10 Wikipedia language editions.