Later on, Chingiz Khan married one of his
daughters to the son of Alahush, by name Po-yao-ho, who, however, had no
children by her. He had three sons by a concubine, the eldest of whom,
Kiun-pu-hwa, was married to Kuyuk Khan's daughter. Kiun-pu-hwa's son, Ko-
li-ki-sze, had two wives, both of imperial blood. During a campaign
against Haidu, he was made prisoner in 1298, and murdered. His title and
dignities passed over in A.D. 1310 to his son Chuan. Nothing is known of
Alahush's later descendants; they probably became entirely Chinese, like
their relatives of the Liao-tung branch.
"The Wang-Ku princes were thus de jure the sons-in-law of the Mongol
Khans, and they had, moreover, the hereditary title of Kao-t'ang princes
(Kao-t'ang wang); it is very possible that they had their residence in
ancient T'ien-te Kiun (although no mention is made of it in history), just
as at present the Tumot princes reside in Kuku-hoton.
"The consonance of the names of Wang-Khan and Wang-Ku (Ung-Khan and Ongu)
led to the confusion regarding the tribes and persons, which at Marco
Polo's time seems to have been general among the Europeans in China; Marco
Polo and Johannes de Monte Corvino transfer the title of Prester John from
Wang-Khan, already perished at that time, to the distinguished family of
Wang-Ku.
