Russian cellist and writer (b. 1871; d. 1958), born Yulian Ignatyevich Poplavsky (Юлиан Игнатьевич Поплавский).
In the early 1890s Poplavsky studied the cello at the Moscow Conservatory under Alfred von Glenn. He was a guest at the composer's home shortly before his death in October 1893, and subsequently wrote an account of "Tchaikovsky's Last Days at Klin".
Correspondence with Tchaikovsky
2 letters from Tchaikovsky to Yulian Poplavsky have survived, dating from 1893, both of which are available in English translations on this website:
3 letters from Poplavsky to the composer, dating from 1893, are preserved in the Klin House-Museum Archive.