Who is the most recent saint recognized by both the Catholic and the Orthodox churches?

Both the Roman Catholic and Eastern Orthodox churches recognize certain individuals as [saints](https://en.wikipedia.org/wiki/Saint)—particularly holy individuals who are believed to be in Heaven. The most famous saints become popular objects of veneration and are catalogued in extensive (but not exhaustive) official lists, such as the [Roman Martyrology](https://en.wikipedia.org/wiki/Roman_Martyrology) . The two churches have not been in communion for nearly a thousand years, and at the time they separated, they did not use today's more rigorous [canonization](https://en.wikipedia.org/wiki/Canonization#Catholic_Church) and [glorification](https://en.wikipedia.org/wiki/Glorification#Eastern_Orthodox_Church) processes for officially recognizing saints. Many ancient and medieval figures are recognized as saints by both churches today because of traditions that long predate the schism. What I would like to know is, who is the most recently deceased individual who is officially recognized and venerated as a saint by both the Roman Catholic and Eastern Orthodox churches? According to [this answer](https://christianity.stackexchange.com/a/17044/23250) , [Vladimir the Great](https://en.wikipedia.org/wiki/Vladimir_the_Great) (956–1015) is one contender. I'd be particularly interested to learn whether there are any mutually recognized saints from *after* the Great Schism of 1054.