Bathy, or Baatu, Ordu, Siba, and Boru are the sons of Thosut-khan.

The mother of Mengu was Seroctan, the greatest lady among the Tartars, and the most honoured except the emperor's mother, and more powerful than any subject except Bathy.

The following is a list of their dukes: Ordu, Bathy, Huryn, Cadan, Syban, and Ouygat, who were all in Hungary; Cyrpodan, who remains beyond the sea, making war against certain soldans of the Saracens, and other transmarine nations.

Of the Election of the Emperor Occoday, and of the Expedition of Duke Bathy.

On the death of Zingis-chan, the dukes assembled and elected his son Occoday, Ugadai, or Oktai-khan, emperor in his place; who immediately, in a council of the nobles, divided the army, and sent Bathy, or Baatu-khan, who was next in authority, against the land of Altissodan and the country of the Bissermini, who were Saracens, though they spoke the language of the Comanians.

Bathy defeated these people in battle; but the city of Barchin, which was surrounded with strong walls, resisted for a long while, until the Tartars filled up the ditches and won the place, which they destroyed.