Question: Who is Cuthwulf (Son Of Cuthwine)'s paternal grandfather?

Knowledge 1: Cuthwulf (son of Cuthwine)
Cuthwulf, also sometimes Cutha (fl. 592-648), was the third son of Cuthwine, and consequently a member of the House of Wessex.Although a member of the direct male line from Cynric to Egbert (see House of Wessex family tree), Cuthwulf was never king.He is said to have been born "circa" 592, and his death date is unknown.His brothers were Cynebald and Cedda; his son was Ceolwald of Wessex; nothing more of his life is known.Due to the similarity of his name to his father's name, and the shadowy nature of early Anglo-Saxon genealogies, it appears that he was often confused with his father Cuthwine.For example, Caedwalla was said to be the son of Cedda and the grandson of Cutha, where Cutha here presumably refers to Cuthwine, since Cedda is also said to be the brother of Cuthwulf. [SEP] Knowledge 2: Cuthwine of Wessex
Cuthwine, born c. 565, was a member of the House of Wessex, the son of Ceawlin of Wessex.After the deposition of his father, Ceawlin, from the throne of Wessex in 592, he did not inherit the throne, which instead passed to his cousin, Ceol.Cuthwine went into exile for many decades, remaining a strong leader of the Saxons and passing on the royal line through his three sons.
Knowledge 1: Cuthwulf (son of Cuthwine)
Cuthwulf, also sometimes Cutha (fl. 592-648), was the third son of Cuthwine, and consequently a member of the House of Wessex.Although a member of the direct male line from Cynric to Egbert (see House of Wessex family tree), Cuthwulf was never king.He is said to have been born "circa" 592, and his death date is unknown.His brothers were Cynebald and Cedda; his son was Ceolwald of Wessex; nothing more of his life is known.Due to the similarity of his name to his father's name, and the shadowy nature of early Anglo-Saxon genealogies, it appears that he was often confused with his father Cuthwine.For example, Caedwalla was said to be the son of Cedda and the grandson of Cutha, where Cutha here presumably refers to Cuthwine, since Cedda is also said to be the brother of Cuthwulf. [SEP] Knowledge 2: Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.He was the grandfather of Emperor Yōzei.
Knowledge 1: Cuthwulf (son of Cuthwine)
Cuthwulf, also sometimes Cutha (fl. 592-648), was the third son of Cuthwine, and consequently a member of the House of Wessex.Although a member of the direct male line from Cynric to Egbert (see House of Wessex family tree), Cuthwulf was never king.He is said to have been born "circa" 592, and his death date is unknown.His brothers were Cynebald and Cedda; his son was Ceolwald of Wessex; nothing more of his life is known.Due to the similarity of his name to his father's name, and the shadowy nature of early Anglo-Saxon genealogies, it appears that he was often confused with his father Cuthwine.For example, Caedwalla was said to be the son of Cedda and the grandson of Cutha, where Cutha here presumably refers to Cuthwine, since Cedda is also said to be the brother of Cuthwulf. [SEP] Knowledge 2: Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.

Answer: Ceawlin of Wessex