Duke Chu of Jin
Duke Chu of Jin  was from 474 to 452 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 Zao, and Duke Chu was his posthumous title.
He succeeded his father, Duke Ding of Jin, who died in 475 BC.
He was in effect the last ruler of Jin, as at the end of his reign Jin would be partitioned into the new states of Han, Zhao, and Wei, although the title of the Duke of Jin would still exist in name only for several more generations.
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.
Marquis Li of Jin
Marquis Li of Jin, ancestral name Ji( 姬), given name Fu( 福), was the fifth ruler of the state of Jin during the Western Zhou Dynasty.
After his father, Marquis Cheng of Jin, died, he ascended the throne of Jin.
After he died in 859 BC, his son, Yijiu, ascended the throne as the next ruler of Jin: Marquis Jing of Jin.
In 1992, an ancient tomb dating back to the Zhou Dynasty was discovered in Quwo County, Shanxi.
One of the tombs was marked as the tomb of Marquis Li of Jin.
Quwo County is known to be the site of the ancient capital of the state of Jin.
Marquis Xi of Jin
Marquis Xi of Jin, ancestral name Ji( 姬), given name Situ( 司徒), was the seventh ruler of the state of Jin during the Western Zhou Dynasty.
After his father Marquis Jing of Jin died, he ascended the throne of Jin.
In 823 BC, the 18th year of his reign, he died and his son Ji, ascended the throne as the next ruler of Jin: Marquis Xian of Jin.
Duke Lie of Jin
Duke Lie of Jin (died 389 BC) was from 415 to 389 BC the titular ruler of the State of Jin during the beginning of the Warring States period of ancient China.
His ancestral name was Ji, given name Zhi, and Duke Lie was his posthumous title.
After his father Duke You of Jin died in 416 BC, Marquess Wen of Wei installed Duke Lie on the throne.
Since 453 BC, near the end of the reign of Duke Chu of Jin, the state of Jin had already been partitioned into three "de facto" states of Han, Zhao, and Wei.
The only territories under the Duke's control were the traditional capitals Jiang and Quwo.
In 403 BC, during Duke Lie's reign, King Weilie of Zhou officially proclaimed Han, Zhao, and Wei vassal states.
Duke Lie was the titular Duke of Jin for 27 years.
He died in 389 BC and was succeeded by his son Duke Huan of Jin, also called Duke Xiao in the "Records of the Grand Historian".
Marquis Wu of Jin
Marquis
Wu of Jin, Ancestral name is Ji( 姬), given name is Ningzu( 寧族), was the third ruler of the state of Jin during the Western Zhou Dynasty.
After his father, Xie, Marquis of Jin died, he ascended the throne of Jin.
After he died, his son, Furen, ascended the throne as the next ruler of Jin: Marquis Cheng of Jin.
Marquis Xian of Jin
Marquis Xian of Jin, ancestral name Ji( 姬), given name Su( 蘇), was the eighth ruler of the state of Jin during the Western Zhou Dynasty.
After his father, Marquis Xi of Jin died in 823 BC, he ascended the throne of Jin.
In 812 BC, the 11th year of his reign, he died and his son Feiwang, ascended the throne as the next ruler of Jin: Marquis Mu of Jin.
Marquis Jing of Jin
Marquis Jing of Jin, Ancestral name is Ji( 姬), given name is Yijiu( 宜臼), was the sixth ruler of the state of Jin during the Western Zhou Dynasty.
After his father, Marquis Li of Jin died, he ascended the throne of Jin.
In 842 BC, the seventeenth year of the reign of Marquis Jing of Jin, King Li of Zhou was driven out of Haojing, then the capital of Zhou, because of his tyranny.
Two dukes became regents during that time and it was called the Gonghe Regency.
Marquis Jing of Jin died the year after in 841 BC and his son, Situ, ascended the throne as the next ruler of Jin: Marquis Xi of Jin.
According to surname records, the Chinese surname Yangshe( 羊舌) originated in the state of Jin.
Marquis Jing of Jin's son, Boqiao( 伯僑) has a grandson named Tu( 突).
During the time of Marquis Xian of Jin, Tu was given a land called Yangshe, modern Hongdong County and Qin County, Shanxi, by Marquis Xian of Jin.
Therefore,
Tu's clan name became Yangshe and this is where the surname Yangshe started.
Duke Ding of Jin
Duke Ding of Jin (died 475 BC) was from 511 to 475 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 Wu, and Duke Ding was his posthumous title.
He succeeded his father, Duke Qing of Jin, who died in 512 BC.
Duke Xian of Jin
Duke Xian of Jin( died 651 BC), ancestral name Ji( 姬), given name Guizhu( 詭諸), was the nineteenth ruler of the State of Jin.
He was also the ninth ruler of Jin in the Spring and Autumn period and the second duke of Jin.
When his father, Duke Wu of Jin, died in 677 BC, Guizhu ascended the throne of Jin and became Duke Xian of Jin.
He reigned for 26 years.
He moved the capital from Quwo( 曲沃) to Jiang( 絳).
He was named after a Rongdi tribe( 戎狄族) leader Guizhu( 詭諸) whom his father, Duke Wu of Jin, captured alive.
During his reign, the State of Jin was one of the most powerful and largest states due to his conquests in many small neighboring states.
He is also renowned for the slaughter and exile of many royal family members of Jin and for favoring one of his concubines named Li Ji.

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