(Xu Wen had six biological sons known to history — Xu Zhixùn, Xu Zhixún, Xu Zhihui (徐知誨), Xu Zhijian (徐知諫), Xu Zhizheng (徐知證), and Xu Zhi'e (徐知諤); and it appeared that at least five, if not all six, were younger than Xu Zhigao.)
(Xu Wen memiliki enam putra biologis yang diketahui sejarah — Xu Zhixùn, Xu Zhixún, Xu Zhihui (徐知誨), Xu Zhijian (徐知諫), Xu Zhizheng (徐知證), dan Xu Zhi'e (徐知諤); dan tampak bahwa setidaknya lima, jika tidak semua enam, lebih muda dari Xu Zhigao.)