Righteous Eudokia of Kashin (identity unconfirmed)

An exhaustive search of authoritative sources (the reference article "Eudokia" in the Orthodox Encyclopedia at pravenc.ru, the full roster of saints named Eudokia on azbyka.ru, diocesan and patriarchal materials) found no individually glorified saint named "Eudokia of Kashin." The only canonized saint closely associated with the city of Kashin is Venerable Anna of Kashin (†1338), Princess of Tver, wife of Grand Prince Michael Yaroslavich of Tver, who took monastic vows first under the name Euphrosyne and later, before her death, the great schema under the name Anna. The similarity between the names "Eudokia," "Euphrosyne," and "Eudokia of Moscow" has repeatedly caused confusion in popular and amateur listings of "righteous women of Old Rus'." Furthermore, the image previously attached to this card was sourced as "Eudokia of Heliopolis" — a real but entirely different 2nd-century martyr from Phoenicia (modern Lebanon, Baalbek), with no connection whatsoever to Kashin or Rus'; this mismatch points to an automated cross-referencing error during initial database population. In the absence of a confirming source, this entry is marked as an unconfirmed identity and disabled from calendar display.