Righteous Catherine of Tarusa

No authoritative source (azbyka.ru, drevo-info.ru, pravenc.ru, days.pravoslavie.ru, ru.wikipedia.org) contains information about a canonized "Princess Catherine of Tarusa." The name Catherine was not widespread in Rus' until the mid-17th century (it was borrowed and came into wide use significantly later than the era of the appanage Principality of Tarusa, 13th-15th centuries), making the existence of a medieval Russian princess with this name an unlikely anachronism. The original template carried the same 2-date cluster (November 25/December 7) as Great Martyr Catherine of Alexandria (catherine) — these dates belong specifically to her. Pending a reliable source, the card is honestly marked as unconfirmed and hidden from the calendar.