Question: Who is Duke Zhao Of Jin's paternal grandfather?

Knowledge 1: Duke Zhao of Jin
Duke Zhao of Jin (died 526 BC) was from 531 to 526 BC the ruler of the State of Jin, a major power during the Spring and Autumn period of ancient China.His ancestral name was Ji, given name Yi, and Duke Zhao was his posthumous title.He succeeded his father, Duke Ping of Jin, who died in 532 BC.Duke Zhao of Jin reigned for 6 years and died in 526 BC.During his reign the state was increasingly dominated by the six powerful clans: Han, Zhao, Wei, Fan, Zhonghang, and Zhi.He was succeeded by his son, Duke Qing of Jin. [SEP] Knowledge 2: Duke Ping of Jin
Duke Ping of Jin (died 532 BC) was from 557 to 532 BC the ruler of the State of Jin, a major power during the Spring and Autumn period of ancient China.His ancestral name was Ji, given name Biao, and Duke Ping was his posthumous name.He succeeded his father, Duke Dao of Jin, who died in 558 BC.
Knowledge 1: Duke Zhao of Jin
Duke Zhao of Jin (died 526 BC) was from 531 to 526 BC the ruler of the State of Jin, a major power during the Spring and Autumn period of ancient China.His ancestral name was Ji, given name Yi, and Duke Zhao was his posthumous title.He succeeded his father, Duke Ping of Jin, who died in 532 BC.Duke Zhao of Jin reigned for 6 years and died in 526 BC.During his reign the state was increasingly dominated by the six powerful clans: Han, Zhao, Wei, Fan, Zhonghang, and Zhi.He was succeeded by his son, Duke Qing of Jin. [SEP] Knowledge 2: Marquis Xiao of Jin
Marquis Xiao of Jin, ancestral name Ji( 姬), given name Ping( 平), was the thirteenth ruler of the state of Jin.He was also the third ruler of Jin in the Spring and Autumn period.He ruled for sixteen years.In 739 BC, the 7th year of the reign of Marquis Zhao of Jin, a Jin official named Panfu( 潘父) murdered Marquis Zhao of Jin and welcomed Uncle Huan of Quwo to ascend the throne of Jin.He accepted Panfu's welcome and entered Jin.When he entered, the Jin people brought troops to stop him from entering.He lost and receded back to Quwo.Then, the Jin people asked the son of Marquis Zhao of Jin, Ping, to ascend the throne and he became the next ruler of Jin: Marquis Xiao of Jin.After he ascended the throne, he killed Panfu in revenge for his father.In 724 BC, the 15th year of his reign, the son of Uncle Huan of Quwo, Count Zhuang of Quwo, murdered Marquis Xiao of Jin while in the capital of Jin, Yi( 翼).Then, Jin troops attacked Count Zhuang of Quwo so he retreated back to Quwo.The Jin people asked the son of Marquis Xiao of Jin, Xi, to become the next ruler of Jin and he became Marquis E of Jin.
Knowledge 1: Marquis Ai of Jin
Marquis Ai of Jin, ancestral name Ji( 姬), given name Guang( 光), was the fifteenth ruler of the state of Jin.He was also the fifth ruler of Jin in the Spring and Autumn period.He reigned for nine years.In 710 BC, the eighth year of his reign, Marquis Ai of Jin attacked a small state south of Jin called Xingting( 陘廷).The next year, Xingting, allied with Duke Wu of Quwo, sacked Yi( 翼), the capital of Jin.After getting his half- uncle, Han Wan, to kill an escaping Marquis Ai of Jin, The Zhou king ensured that Ai's son, Marquis Xiaozi of Jin, became the next ruler of Jin. [SEP] Knowledge 2: Marquis Xiao of Jin
Marquis Xiao of Jin, ancestral name Ji( 姬), given name Ping( 平), was the thirteenth ruler of the state of Jin.He was also the third ruler of Jin in the Spring and Autumn period.He ruled for sixteen years.In 739 BC, the 7th year of the reign of Marquis Zhao of Jin, a Jin official named Panfu( 潘父) murdered Marquis Zhao of Jin and welcomed Uncle Huan of Quwo to ascend the throne of Jin.He accepted Panfu's welcome and entered Jin.When he entered, the Jin people brought troops to stop him from entering.He lost and receded back to Quwo.Then, the Jin people asked the son of Marquis Zhao of Jin, Ping, to ascend the throne and he became the next ruler of Jin: Marquis Xiao of Jin.After he ascended the throne, he killed Panfu in revenge for his father.In 724 BC, the 15th year of his reign, the son of Uncle Huan of Quwo, Count Zhuang of Quwo, murdered Marquis Xiao of Jin while in the capital of Jin, Yi( 翼).Then, Jin troops attacked Count Zhuang of Quwo so he retreated back to Quwo.The Jin people asked the son of Marquis Xiao of Jin, Xi, to become the next ruler of Jin and he became Marquis E of Jin.

Answer: Duke Dao of Jin