Emperor Taizong of Tang

Family

Father
- Emperor Gaozu of Tang
Mother
- Duchess Dou, Emperor Gaozu's wife, daughter of Dou Yi (竇毅) the Duke of Shenwu during Northern Zhou and Sui Dynasty and the Princess Xiangyang daughter of Yuwen Tai, posthumously honored as Empress Taimushunsheng
Wife
- Empress Zhangsun (created 626, d. 636), mother of Crown Princes Chengqian and Zhi, Prince Tai, and Princesses Changle, Jinyang, and Xincheng
Major Concubines
- Consort Xu Hui (徐惠) (627–650), titled Chongrong (充容), posthumously honored Xianfei (賢妃)
- Consort Yang, daughter of Emperor Yang of Sui, mother of Princes Ke and Yin
- Consort Yin, mother of Prince You
- Consort Wang, mother of Prince Yun
- Consort Yan, mother of Princes Zhen and Xiao
- Consort Wei, mother of Prince Shen and Princess Linchuan
- Consort Yang, mother of Prince Fu
- Consort Yang, formerly wife and princess of Li Yuanji the Prince of Qi, mother of Prince Ming
- Consort Wu, later wife and empress of Emperor Gaozong, later Emperor of Zhou, commonly known as Wu Zetian
Sons
- Li Chengqian (李承乾), initially the Prince of Changshan (created 620), later the Prince of Zhongshan (created 622), later the Crown Prince (created 626), later reduced to commoner rank (deposed 643), posthumously honored as Prince Min of Changshan
- Li Kuan (李寬) (d. 620?), posthumously created the Prince of Chu
- Li Ke (李恪), initially the Prince of Changsha (created 620), later the Prince of Han, later the Prince of Shu (created 628), later the Prince of Wu (created 636, forced to commit suicide 653), posthumously created the Prince of Yulin
- Li Tai (李泰), initially the Prince of Yidu (created 620), later the Prince of Wei (created 621), later the Prince of Yue (created 628), later the Prince of Wei (created 636), later demoted to the Prince of Donglai (demoted 643), later the Prince of Shunyang (created 643), later Prince Gong of Pu (created 647)
- Li You (李祐), initially the Prince of Yiyang (created 625), later the Prince of Chu, later the Prince of Yan (created 628), later the Prince of Qi (created 636, forced to commit suicide 653)
- Li Yin (李愔), initially the Prince of Liang (created 631), later the Prince of Shu (created 636), later reduced to commoner rank (deposed 653), later the Prince of Peiling (d. 667), posthumously created Prince Dao of Shu
- Li Yun (李惲), initially the Prince of Tan (created 631), later the Prince of Jiang (created 636, committed suicide 674)
- Li Zhen (李貞), initially the Prince of Han (created 631), later the Prince of Yue (created 636, committed suicide 688)
- Li Zhi (李治), initially the Prince of Jin (created 631), later the Crown Prince (created 643), later Emperor Gaozong of Tang
- Li Shen (李慎), initially the Prince of Shen (created 631), later the Prince of Ji (created 636), later reduced to commoner rank (deposed and d. 688)
- Li Xiao (李囂), Prince Shang of Jiang (created 631, d. 632)
- Li Jian (李簡), the Prince of Dai (created and d. 631)
- Li Fu (李福), the Prince of Zhao (created 639, d. 670)
- Li Ming (李明), initially the Prince of Cao (created 647), later demoted to Prince of Lingling (demoted 680 or 681, forced to commit suicide 682)
Daughters
- Princess Xiangcheng (d. 651)
- Princess Runan
- Princess Nanping
- Princess Sui'an
- Li Lize (李麗質), Princess Changle (621–643), married Zhangsun Wuji's son Zhangsun Chong (長孫沖)
- Princess Yuzhang
- Princess Baling (forced to commit suicide 653), posthumously created Princess Bijing
- Princess Pu'an
- Princess Dongyang
- Princess Linchuan (d. 682)
- Li Jing (李敬), Princess Qinghe (d. 664)
- Li Shu (李淑), Princess Lanling
- Princess Jin'an
- Princess Ankang
- Princess Xingxing
- Princess Chengyang, her first husband was Du Ruhui's son Du He (杜荷), her second husband was Xue Yao (薛曜); her son Xue Shao (薛紹) married Emperor Gaozong's daughter Princess Taiping
- Princess Gaoyang (forced to commit suicide 653), posthumously created Princess Hepu
- Princess Jinshan
- Li Mingda (李明達), Princess Jinyang
- Princess Changshan (d. 656)
- Princess Xincheng