Question: Who is the paternal grandmother of Publius Licinius Egnatius Marinianus?

Knowledge 1: Publius Licinius Egnatius Marinianus
Publius Licinius Egnatius Marinianus (c. 249-268) was the third and youngest son of Roman Emperor Gallienus and "Augusta" Cornelia Salonina.Gallienus appointed him together with Paternus as Consul in early 268.His two older brothers, Valerianus and Saloninus, had died earlier, and thus he was the successor to the throne.Marinianus, along with his uncle Valerianus Minor, perished during the autumn of 268 in a purge of Gallienus' partisans. [SEP] Knowledge 2: Gallienus
Gallienus (c. 218 – September 268), also known as Gallien, was Roman Emperor with his father Valerian from 22 October 253 to spring 260 and alone from spring 260 to September 268.He ruled during the Crisis of the Third Century that nearly caused the collapse of the empire.While he won a number of military victories, he was unable to prevent the secession of important provinces.His 15-year reign was the longest since the 19-year rule of Septimius Severus.Born into a wealthy and traditional senatorial family, Gallienus was the son of Valerian and Mariniana.Valerian became Emperor on 22 October 253 and had the Roman senate elevate Gallienus to the ranks of Caesar and Augustus.Valerian divided the empire between him and his son, with Valerian ruling the east and his son the west.Gallienus defeated the usurper Ingenuus in 258 and destroyed an Alemanni army at Mediolanum in 259.The defeat and capture of Valerian at Edessa in 260 by the Sasanian Empire threw the Roman Empire into the chaos of civil war.Control of the whole empire passed to Gallienus.He defeated the eastern usurpers Macrianus Major and Mussius Aemilianus in 261–262 but failed to stop the formation of the breakaway Gallic Empire under general Postumus.Aureolus, another usurper, proclaimed himself emperor in Mediolanum in 268 but was defeated outside the city by Gallienus and besieged inside.While the siege was ongoing, Gallienus was stabbed to death by the officer Cecropius as part of a conspiracy.
Knowledge 1: Gallienus
Gallienus (c. 218 – September 268), also known as Gallien, was Roman Emperor with his father Valerian from 22 October 253 to spring 260 and alone from spring 260 to September 268.He ruled during the Crisis of the Third Century that nearly caused the collapse of the empire.While he won a number of military victories, he was unable to prevent the secession of important provinces.His 15-year reign was the longest since the 19-year rule of Septimius Severus.Born into a wealthy and traditional senatorial family, Gallienus was the son of Valerian and Mariniana.Valerian became Emperor on 22 October 253 and had the Roman senate elevate Gallienus to the ranks of Caesar and Augustus.Valerian divided the empire between him and his son, with Valerian ruling the east and his son the west.Gallienus defeated the usurper Ingenuus in 258 and destroyed an Alemanni army at Mediolanum in 259.The defeat and capture of Valerian at Edessa in 260 by the Sasanian Empire threw the Roman Empire into the chaos of civil war.Control of the whole empire passed to Gallienus.He defeated the eastern usurpers Macrianus Major and Mussius Aemilianus in 261–262 but failed to stop the formation of the breakaway Gallic Empire under general Postumus.Aureolus, another usurper, proclaimed himself emperor in Mediolanum in 268 but was defeated outside the city by Gallienus and besieged inside.While the siege was ongoing, Gallienus was stabbed to death by the officer Cecropius as part of a conspiracy. [SEP] Knowledge 2: Apollonius (freedman)
Apollonius was a freedman of Publius Licinius Crassus in ancient Rome in the 1st century BCE.Apollonius afterwards became a useful friend of Cicero's, and served in the army of Julius Caesar in the Alexandrine war, and also followed him into Spain.He was a man of great diligence and learning, and anxious to write a history of the exploits of Caesar.For this reason Cicero gave him a very flattering letter of recommendation to Caesar.Apollonius is also believed to have written a biography of Crassus.Since he was manumitted as a term of Publius's will, he is by Roman custom likely to have taken the name Publius Licinius Apollonius as a freedman.The highly laudatory account of Publius's death found in Plutarch suggests that Apollonius's biography was a source.
Knowledge 1: Publius Licinius Egnatius Marinianus
Publius Licinius Egnatius Marinianus (c. 249-268) was the third and youngest son of Roman Emperor Gallienus and "Augusta" Cornelia Salonina.Gallienus appointed him together with Paternus as Consul in early 268.His two older brothers, Valerianus and Saloninus, had died earlier, and thus he was the successor to the throne.Marinianus, along with his uncle Valerianus Minor, perished during the autumn of 268 in a purge of Gallienus' partisans. [SEP] Knowledge 2: Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.

Answer: Mariniana