King Huai of Chu
King Huai of Chu( died 296 BC) was from 328 to 299 BC the king of the state of Chu during the Warring States period of ancient China.
He was born Xiong Huai and King Huai( 懷, a different Chinese character) was his posthumous title.
King Huai succeeded his father King Wei of Chu, who died in 329 BC.
In 299 BC King Huai was trapped and held hostage by King Zhao of Qin when he went to the state of Qin for negotiation, and his son King Qingxiang of Chu ascended the throne.
King Huai managed to escape but was recaptured by Qin.
Three years later, he died in captivity.
One of his grandsons was later reinstated as King of Chu as the Qin dynasty descended into chaos, also under the name" King Huai of Chu"; this grandson was later known as Emperor Yi of Chu.
King Dao of Chu
King Dao of Chu( died 381 BC) was the king of the state of Chu from 401 BC to 381 BC during the early Warring States period of ancient China.
He was born Xiong Yi and King Dao was his posthumous title.
King Dao succeeded his father King Sheng of Chu, who died in 402 BC.
He died after a reign of 21 years and was succeeded by his son, King Su of Chu.
Fuchu
Fuchu, full name Xiong Fuchu, was from 227 to 223 BC the last king of the state of Chu during the late Warring States period of ancient China.
Fuchu was his given name and he did not receive a posthumous title.
Fuchu usurped the throne in 227 BC after he murdered his younger half- brother King Ai of Chu.
In 223 BC he was captured and deposed by the army of Qin.
King Ai of Zhou
King Ai of Zhou was the twenty- ninth king of the Chinese Zhou Dynasty and the seventeenth of Eastern Zhou.
He was the eldest son of King Zhending of Zhou.
He succeeded his father in 441, but was killed by his younger brother after only three months on the throne.
King Cheng of Chu
King Cheng of Chu( died 626 BC) was from 671 to 626 BC king of the state of Chu during the Spring and Autumn period of ancient China.
He was born Xiong Yun to King Wen of Chu, and King Cheng was his posthumous title.
In 672 BC Xiong Yun's older brother king Du'ao tried to kill him, and he escaped to the state of Sui.
He then attacked and killed Du'ao with the help of Sui, and succeeded Du'ao as king of Chu.
In the summer of 648 BC, the State of Huang was annexed by the state of Chu. King Cheng's wife was Zheng Mao.
Their son was possibly King Mu of Chu.
King Kaolie of Chu
King Kaolie of Chu (died 238 BC) was from 262 to 238 BC the king of the state of Chu during the late Warring States period of ancient China.
He was born Xiong Yuan (熊元) or Xiong Wan (熊完), and King Kaolie
was his posthumous title.
King Kaolie succeeded his father King Qingxiang of Chu, who died in 263 BC.
King Kaolie died in 238 BC after 25 years of reign, and was succeeded by his son King You of Chu.
In 249 BC King Kaolie invaded and annexed the State of Lu.
King Ai of Chu
King Ai of Chu (died 228 BC), born Xiong You , was a king of Chu during the late Warring States period of ancient China.
He was the son of King Kaolie of Chu and full younger brother of King You of Chu.
Prince You succeeded his elder brother as king in 228 BC, but was murdered only two months later by the supporters of his elder half-brother Prince Fuchu.
Prince Fuchu ascended the throne as king of Chu.
Shenyin Shu
Shenyin Shu or Shenyin Xu(?
- 506 BC) was a general of the State of Chu during the Spring and Autumn period of ancient China.
He was a great- grandson of King Zhuang of Chu.
King You of Chu
King You of Chu( died 228 BC) was from 237 to 228 BC the king of the state of Chu during the late Warring States period of ancient China.
He was born Xiong Han and King You was his posthumous title.
He succeeded his father King Kaolie of Chu and during his reign You's maternal uncle Li Yuan( 李园) served as prime minister.
In 235 BCE, after an attack on the State of Zhao, troops from the states of Qin and Wei united to attack Chu but suffered a defeat.
In March 228 BCE, King You of Chu died and was succeeded by his younger brother Xiong You, who would later be styled King Ai of Chu.
It is rumoured that King You of Chu was actually the illegitimate son of Lord Chunshen.
In the 1930s his tomb at Shou County, Anhui Province was destroyed by warlords, and many artifacts were dispersed, but a great bronze cauldron or ding called 楚大鼎 was preserved and is on display in Anhui Museum.
King Ping of Chu
King Píng of Chu (died 516 BC).
During the Spring and Autumn period of ancient China, he was king of the State of Chu from 528 BC to 516 BC.
He was a son of King Gong of Chu and his consort (a sibling of King Zi'ao).
Born Xiong Qiji , Píng changed his name to Xiong Ju  after ascending the throne, and King Píng was his posthumous title.
The likely reason for his name change was his response to a naming taboo.
He married Bo Ying and was succeeded by their son, King Zhao of Chu.

Question: Who is the paternal grandfather of King Ai Of Chu?
Answer: King Qingxiang of Chu