ジャラールッディーン・メングベルディー
In 1226, when Jalal ad-Din Mingburnu, the shah of the Khwarezmid Empire, conquered the Georgian capital of Tbilisi, putting Queen Rusudan into flight to her western dominions, Ghias ad-Din reconverted to Islam and, according to the chronicler al-Nasawi, obtained "aman" (security) from Jalal ad-Din. However, after the Khwarezmid shah departed to lay siege to Ahlat, Ghias ad-Din returned to Christianity, redefected to the Georgians, and informed them about the weakness of a Khwarezmid garrison in Tbilisi. Rusudan seems to have repudiated the marriage with Ghias ad-Din around the same time, and he becomes unheard of thereafter.