Boroldai

Boroldai (or Burulday, Borolday), also known as Burundai, (Cyrillic: Боролдай) (died 1263) was a Mongol general of the mid 13th century. He participated in the Mongol invasion of Kievan Rus' and Europe from 1236 to 1242 He distinguished himself in the conquest of Ryazan and Suzdal. He led other Mongol raids of Europe until 1263.

The clan of Borolday is not clear. He was probably from one of four tribes that Genghis Khan (1162–1227) assigned to his eldest son, Jochi: the Sanchi'ud (or Salji'ud), Keniges, Uushin, and Je'ured clans.