Marquis Gōng of Cai
Marquis Gōng of Cai( Cài Gōnghóu 蔡宮侯), born as Ji?( 姬?), was the fourth ruler of the State of Cai.
He was the only known son of Earl Huang of Cai( 蔡伯荒) and close kin of King of Zhou.
He was the first in the family to hold the title of the" Marquis of Cai( Cai Guohou 蔡国侯)" which would be in used until the end of the State of Cai in 447 BC.
He was succeeded by his son.
Marquis Xuan of Cai
Marquis Xuan of Cai( 蔡宣侯) (?- 715 BC), born Ji Cuòfu( 姬措父), was the eleventh ruler of the State of Cai from 750 BC to 715 BC.
He was the only known son of Marquis Dai of Cai( 蔡戴侯), his predecessor.
His reign for 35 years.
He was succeeded by his son.
Marquis Li of Cai
Marquis Lì of Cai( 蔡厲侯)( died 863 BC), ancestral name Ji( 姬), given name unknown, was the fifth ruler of the State of Cai.
He was the only known son of Marquis Gōng of Cai.
He was succeeded by his son.
Earl Huang of Cai
Huang, Earl of Cai, born Ji Huang, was an ancient Chinese noble from the Zhou dynasty and the third ruler of the ancient Chinese state of Cai. Huang was the only known son of Zhong Hu of Cai and the second cousin of Kings Cheng and Kang of Zhou.
His son inherited his land as Marquis Gōng of Cai, with a higher title," hou" rather than" bo".
Marquis Wu of Cai
Marquis Wu of Cai( 蔡武侯)( died 837 BC), born as Ji?( 姬?; his name is lost to history), was the sixth ruler of the State of Cai from 863 BC to 837 BC.
He was the only known son of Marquis Lì of Cai( 蔡厲侯), his predecessor.
His reign lasted for 28 years.
He was succeeded by his son.
Marquis Huan of Cai
Marquis Huan of Cai( 蔡桓侯) (?- 695 BC), born Jī Fēngrén( 姫封人), was the twelve ruler of the State of Cai from 715 BC to 695 BC.
He was the only known son of Marquis Xuan of Cai( 蔡宣侯), his predecessor.
His reign was a period of 20 years.
He was succeeded by his son.
Marquis Dai of Cai
Marquis Dai of Cai( 蔡戴侯) (?- 750 BC; his name is lost to history) was the tenth ruler of the State of Cai from 760 BC to 750 BC.
He was the only known son of Marquis Gòng of Cai( 蔡共侯), his predecessor.
His reign lasted for 10 years.
He was succeeded by his son.
Marquis Xi of Cai
Marquis Xi of Cai (蔡釐侯) (died 761 BC), given name Suǒshi (所事), was the eight ruler of the State of Cai from 809 BC to 761 BC.
He was the only known son of Marquis Yi of Cai (蔡夷侯), his predecessor.
His reign lasted for 48 years, the longest reign in Cai history.
He was succeeded by his son.
Marquis Yi of Cai
Marquis Yi of Cai (蔡夷侯) (died 809 BC), born as Ji ?
(姬?
; his name is lost to history), was the seventh ruler of the State of Cai from 837 BC to 809 BC.
He was the only known son of Marquis Wu of Cai (蔡武侯).
His reign lasted for 28 years like his father's.
He was succeeded by his son.
Marquis Ai of Cai
Marquis Ai of Cai( 蔡哀侯)( died 675 BC), born Jī Xiànwǔ( 姫獻舞), was the thirteenth ruler of the State of Cai from 695 BC to 675 BC.
He was the only known son of Marquis Huan of Cai( 蔡桓侯), his predecessor.
His reign was a period of 20 years.
In the autumn of 684 BC, King Wen of Chu conquered the State of Cai and took the reigning Marquis as a prisoner of war.
But King Wen of Chu restored the state after Marquis Ai praised Madam Xī( 息妫).
He was succeeded by his son.

Question: Who is Marquis Xi Of Cai's paternal grandfather?