Title: Emperor Yang of Sui
Content: Empress Min, of the Lanling Xiao clan (愍皇后 蘭陵蕭氏; 567–647) ; Yang Zhao, Emperor Xiaocheng (孝成皇帝 楊昭; 584–606), first son ; Yang Jian, Prince of Qi (齊王 楊暕; 585–618), second son ; Princess Nanyang (南陽公主; 586–630), first daughter ; Married Yuwen Shiji, Duke Xincheng (572–642) in 599, and had issue (one son) ; Pin, of the Xiao clan (嬪 蕭氏) ; Yang Gao, Prince of Zhao (趙王 楊杲; 607–618), fourth son ; Unknown ; A daughter who married Li Shimin of Longxi (隴西; 598–649), and had issue (two sons including Li Ke) Consorts and Issue:
Title: Empress Yuanxian
Content:  Lady Yang was from the Yang family of Hongnong, an imperial clan of the Sui dynasty. Her great-grandfather Yang Shida (楊士達) was a high -level official during Sui and had been given the title Prince of Zheng (鄭王). He was also the brother of Lady Yang, the mother of Wu Zetian. Her father Yang Zhiqing (楊知慶) was a general of the imperial guards during the Tang dynasty. Her sister was the wife of former Crown Prince Li Chongjun who was beheaded in a power struggle with Empress Wei, Princess Anle, and imperial consort Shangguan Wan'er. Her sister was honored as Crown Princess Jiemin.
Title: Emperor Yang of Sui
Content:  Yang Guang was born in 569, during the reign of Emperor Wu of Northern Zhou. His parents were Yang Jian, the Duke of Sui, and Yang Jian's wife Duchess Dugu Qieluo; his maternal grandfather was Dugu Xin, a prominent military general and official. He was his parents' second son, after Yang Yong, and he had at least one older sister, Yang Lihua, who became the wife of Emperor Wu's crown prince Yuwen Yun (the later Emperor Xuan) in 573. He was considered handsome and intelligent in his youth, and of Yang Jian's and Duchess Dugu's sons, they favored him the most. Sometime during Northern Zhou, on account of Yang Jian's achievements, he was created the Duke of Yanmen. In 580, Yang Jian seized power as regent after Emperor Xuan's death. In 581, he had Emperor Xuan's son (by the concubine Zhu Manyue), Emperor Jing, yield the throne to him, ending Northern Zhou and establishing Sui Dynasty as its Emperor Wen. Emperor Wen created Yang Yong crown prince and created his other sons imperial princes. Yang Guang thus received the title of Prince of Jin.
Title: Empress Dowager Liu (Sui dynasty)
Content:  Empress Dowager Liu (劉太后, personal name unknown), briefly further honored as Empress Dowager Shenggan (聖感皇太后, literally "the empress dowager with holy emotions"), was an empress dowager of the Chinese dynasty Sui Dynasty. She was a concubine of Yang Zhao, who was crown prince during the reign of his father Emperor Yang, and she was the mother of Yang Tong, the last person to claim the Sui throne. Little is known about her background. During the time that Yang Zhao was crown prince, she carried the title of Liangdi (良娣), which appeared to be the highest of the ranks among a crown prince's concubines. She was younger than another Consort Liu, who bore Yang Zhao's oldest son Yang Tan (楊倓). It is not known when 
Title: Emperor Yang of Sui
Content: [[Image:Simple gold crown.svg|15px]] Yang Guang, Emperor Yang of Sui ; Yang Zhao (楊昭) (584–606) ; Yang Dan (楊倓) (603–618), Prince of Yan (燕王), Zhao's son with Lady Liu the Elder (大刘良娣), killed under Yuwen Huaji's order ; [[Image:Simple gold crown.svg|15px]] Lord Huangtai (皇泰主) (604–619), personal name Yang Tong (杨侗), Zhao's son with Lady Liu the Younger (小劉良娣), bestowed by Wang Shichong as Emperor Gong (恭皇帝), later killed under Wang's order ; [[Image:Simple gold crown.svg|15px]] Emperor Gong (恭皇帝) (605–618), personal name Yang You (楊侑), Zhao's son with Consort Wei (韦妃), died after his abdication in favor of Li Yuan, Imperial Duke of Tang ; Yang Jian (楊暕) (585–618) ; Two elder sons, murdered by Yuwen Huaji in 618 ; 
Title: Emperor Yang of Sui
Content:  Zhengdao (618/619–650s), later given the office of Yuanwai sanqi shilang (员外散骑侍郎) in Tang dynasty ; Yang Chongli (杨崇礼) (?–?), given the office of Minister of Palace Supplies (太府卿), Minister of Revenue (户部尚书) ; Yang Shenming (杨慎名) (?–747), forced to suicide with his brothers by Emperor Xuanzong ; Yang Shenjin (杨慎矜) (?–747), given the office of Palace Assistant Imperial Clerk (御史中丞), conspiring against other Tang officials, later forced to suicide with his brothers by Emperor Xuanzong ; Yang Shenyu (杨慎馀) (?–747), forced to suicide with his brothers by Emperor Xuanzong ; One daughter, married Xin Mou (辛某) ; Xin Jingcou (辛景凑) (?–?) ; One daughter with Lady Wei (韦氏) ; Princess Nanyang (南陽公主) (586–630) ; Yuwen Chanshi (宇文禅师) (?–619), 
Title: Emperor Yang of Sui
Content:  with Yuwen Shiji, executed with his uncles under Dou Jiande's order ; Consort Yang (楊妃) (?–?) ; Li Ke (李恪) (619–653), Prince of Wu (吴王), married Lady Yang, a daughter of Yang Yu (杨誉) and sister of Yang Chongjing (杨崇敬) ; Li Qianli (李千里) (645/646?–708), courtesy name Ren (仁), Prince of Cheng (成王), married Murong Zhenruhai (慕容真如海) (651–726), a descendant of Northern Yan royalty ; Li Xi (李禧) (?–?), Prince of Tianshui Commandery (天水郡王) ; Li Wei (李玮) (647–642), posthumously promoted as Prince of Langling Commandery (朗陵郡王), married Lady Feng, great-granddaughter of Feng Ang (冯盎) the Imperial Duke of Jing (耿国公), descendant of the Nanyue people ; Li Zuo (李祚) (?–?), Prince of Langling Commandery ; Li Xuan 
Title: Emperor Yang of Sui
Content:  ; Princess of Xin'an County (信安县主) (648–716), married Yuan Sizhong (元思忠), descendant of Tuoba Huang, prince of Northern Wei ; Yuan Shouyi (元守一) (?–?) ; Yuan Guan (元瓘) (?–?) ; Yuan Gui (元瓌) (?–?) ; Li Hua (李华) (650–715), Princess of Xuancheng County (宣城县主) ; Li Yin (李愔) (620?–667), Prince of Shu (梁王) ; Li Fan (李璠) (?–689), Prince Sishu (嗣蜀王) ; Li Chou (李畴) (?–689), Prince of Guangdou Commandery (广都郡王) ; Li Jin (李瑾) (?–?), Prince of Jiangling Commandery (江陵郡王) ; Princess of Bao'an County (宝安县主) (?–?), married Cui Sigu (崔思古) ; Cui Zikan (崔子偘) (?–?), chariot servant (辇郎) of Gaozong ; (?) Princess Huainan (淮南公主) (?–?) ; Ashina Heluogu (阿史那賀邏鶻) (?–?), son with Ashina Shibobi 
Title: Emperor Yang of Sui
Content:  Emperor Yang of Sui (隋煬帝, 569 – 11 April 618), personal name Yang Guang (楊廣), alternative name Ying (英), Xianbei name Amo (阿摩), also known as Emperor Ming of Sui (隋明帝) during the brief reign of his grandson Yang Tong) was the second son of Emperor Wen of Sui, and the second emperor of China's Sui dynasty. Emperor Yang's original name was Yang Ying, but was renamed by his father, after consulting with oracles, to Yang Guang. Yang Guang was made the Prince of Jin after Emperor Wen established the Sui Dynasty in 581. In 588, he was granted command of the five armies that invaded the southern Chen dynasty and was widely praised for the success of this campaign. These 
Title: Yang Hao (Sui dynasty)
Content: Father ; Yang Jun, Prince Xiao of Qin ; Mother ; Princess Cui (forced to commit suicide 597), Yang Jun's wife, sister of Cui Hongdu (崔弘度) 

Question: Who is the mother of Emperor Yang of Sui?
Answer: Empress Dugu Qieluo.
Dugu jialuo.
Wenxian huanghou of Sui Dynasty.