From: http://www.oddmarthinsen.no/tng/getperson.php?personID=10767&tree=tre1 Another name for Ragnhild was Ragnhild Den Mektige Eiriksdatter. General Notes: Ragnhild was a daughter of King Eirik of Jutland (Jylland).From Snorre Sturlasson: Harald Hårfagre's Saga: "21. HARALD'S MARRIAGE AND HIS CHILDREN.... King Harald had many wives and many children. Among them he had one wife, who was called Ragnhild the Mighty, a daughter of King Eirik, from Jutland; and by her he had a son, Eirik Blood-axe.... It is told that King Harald put away nine wives when he married Ragnhild the Mighty. So says Hornklofe: --"Harald, of noblest race the head,A Danish wife took to his bed;And out of doors nine wives he thrust, --The mothers of the princes first.Who 'mong Holmrygians hold command,And those who rule in Hordaland.And then he packed from out the placeThe children born of Holge's race." ...""24. ROLF GANGER DRIVEN INTO BANISHMENT.... Queen Ragnhild the Mighty lived three years after she came to Norway; and, after her death, her son and King Harald's was taken to the herse Thorer Hroaldson, and Eirik was fostered by him."Ragnhild married Harald I Halvdansson Hårfagre (Lufa) of Norway, son of Halvdan "den Svarte" Gudrødsson and Ragnhild Sigurdsdatter. (Harald I Halvdansson Hårfagre (Lufa) of Norway was born circa 860 and died circa 940.) Marriage Notes: Harald's child with Ragnhild Eiriksdotter of Jutland:Eirik Bloodaxe, king of Norway. 3
From Wikipedia: Flavius Valerius Constantinus, as he was originally named, was born in the city of Naissus (today Niš, Serbia), part of the Dardania province of Moesia on 27 February,[34] probably c. AD 272.[35] His father was Flavius Constantius, an Illyrian,[36][37] and a native of Dardania province of Moesia (later Dacia Ripensis).[38] Constantine probably spent little time with his father[39] who was an officer in the Roman army, part of the Emperor Aurelian's imperial bodyguard. Being described as a tolerant and politically skilled man,[40] Constantius advanced through the ranks, earning the governorship of Dalmatia from Emperor Diocletian, another of Aurelian's companions from Illyricum, in 284 or 285.[38] Constantine's mother was Helena, a Greek woman of low social standing from Helenopolis of Bithynia.[41] It is uncertain whether she was legally married to Constantius or merely his concubine.[42] His main language was Latin, and during his public speeches he needed Greek translators.[43] Head from a statue of Diocletian Bust of Maximian In July AD 285, Diocletian declared Maximian, another colleague from Illyricum, his co-emperor. Each emperor would have his own court, his own military and administrative faculties, and each would rule with a separate praetorian prefect as chief lieutenant.[44] Maximian ruled in the West, from his capitals at Mediolanum (Milan, Italy) or Augusta Treverorum (Trier, Germany), while Diocletian ruled in the East, from Nicomedia (İzmit, Turkey). The division was merely pragmatic: the empire was called "indivisible" in official panegyric,[45] and both emperors could move freely throughout the empire.[46] In 288, Maximian appointed Constantius to serve as his praetorian prefect in Gaul. Constantius left Helena to marry Maximian's stepdaughter Theodora in 288 or 289.[47] Diocletian divided the Empire again in AD 293, appointing two caesars (junior emperors) to rule over further subdivisions of East and West. Each would be subordinate to their respective augustus (senior emperor) but would act with supreme authority in his assigned lands. This system would later be called the Tetrarchy. Diocletian's first appointee for the office of Caesar was Constantius; his second was Galerius, a native of Felix Romuliana. According to Lactantius, Galerius was a brutal, animalistic man. Although he shared the paganism of Rome's aristocracy, he seemed to them an alien figure, a semi-barbarian.[48] On 1 March, Constantius was promoted to the office of caesar, and dispatched to Gaul to fight the rebels Carausius and Allectus.[49] In spite of meritocratic overtones, the Tetrarchy retained vestiges of hereditary privilege,[50] and Constantine became the prime candidate for future appointment as caesar as soon as his father took the position. Constantine went to the court of Diocletian, where he lived as his father's heir presumptive.[51]