Although his birth date is uncertain, some chronicles report that Yuri's elder brother, Viacheslav, said to him: "I am much older than you; I was already bearded when you were born."
Meski tanggal lahirnya tidak pasti, beberapa kronik melaporkan bahwa kakak laki-laki Yuri, Viacheslav, Dia berkata kepadanya: "Saya jauh lebih tua dari Anda, saya sudah berjanggut saat dilahirkan."