Information:  - The Ostrogoths were the eastern branch of the later Goths (the other major branch being the Visigoths). The Ostrogoths traced their origins to the Greutungi  a branch of the Goths who had migrated southward from the Baltic Sea and established a kingdom north of the Black Sea, during the 3rd and 4th centuries. They built an empire stretching from the Black Sea to the Baltic. The Ostrogoths were probably literate in the 3rd century, and their trade with the Romans was highly developed. Their Danubian kingdom reached its zenith under King Ermanaric, who is said to have committed suicide at an old age when the Huns attacked his people and subjugated them in about 370.  - Radegund (also spelled "Rhadegund, Radegonde, or Radigund"; 520  13 August 587) was a Thuringian princess and Frankish queen, who founded the Abbey of the Holy Cross at Poitiers. She is the patron saint of several churches in France and England and of Jesus College, Cambridge (whose full name is "The College of the Blessed Virgin Mary, Saint John the Evangelist "and the glorious Virgin Saint Radegund", near Cambridge").  - Theodahad (born c. 480 in Tauresium  died 536) was the King of the Ostrogoths from 534 to 536 and a nephew of Theodoric the Great through his sister Amalafrida.  - Baderic, Baderich, Balderich or Boderic (ca. 480  529), son of Bisinus and Basina, was a co-king of the Thuringii. He and his brothers Hermanfrid and Berthar succeeded their father Bisinus. After Hermanfrid defeated Berthar in battle, he invited King Theuderic I of Metz to help him defeat Baderic in return for half of the kingdom. Theuderic I agreed and Baderic was defeated and killed in 529. Hermanfrid became the sole king.  - Wacho (or Waccho) (probably Waldchis) was king of the Lombards before they entered Italy from an unknown date (perhaps c. 510) until his death in 539. His father was Unichis. Wacho usurped the throne by assassinating (or having assassinated) his uncle, King Tato (again, probably around 510). Tato's son Ildchis fought with him and fled to the Gepids where he died. Wacho had good relations with the Franks.  - Theodemir was king of the Ostrogoths of the Amal Dynasty, and father of Theoderic the Great. He had two "brothers" (actually brothers-in-law) named Valamir and Videmir. Theodemir was Arian, while his wife Erelieva was Catholic and took the Roman Christian name Eusebia upon her baptism. He took over the three Pannonian Goth reigns after the death of Widimir, ruled jointly with his brothers-in-law as a vassal of Attila the Hun. The reason is probably that this relatively long reign of the Ostrogoths in Pannonia, while his elder brother Thiudimir only for four years on the throne, followed by Theoderic, and firstly inherited, the heirless, Walamir's part of the kingdom. He was married to Erelieva, with whom he had two children: Theoderic (454526) and Amalafrida. When Theodemir died in 475, Theoderic succeeded him as king.  - Hermanfrid (also Hermanifrid or Hermanafrid) was the last independent king of the Thuringii in present-day Germany. He was one of three sons of King Bessinus (or Bisinus) and the Lombard Menia (or Basina). His siblings were Baderic; Radegund (the elder), married to the Lombard king Wacho; and Bertachar.  - Amalafrid ( Latin : Amalafridas , Greek : '  ) was the son of the last Thuringian king Hermanafrid and his wife Amalaberga , daughter of Amalafrida and niece of the Ostrogothic king Theodoric the Great . After the fall of the royal Thuringian seat of Scithingi to the king of Metz , Theuderic I in 531 , Amalaberga fled to the Ostrogothic king Theodahad , her brother , with Amalafrid and his sister Rodelinda . They were captured by the Byzantine general Belisarius and sent to Constantinople , together with the captured Ostrogothic king Witiges ( or Wittigis ) . Justinian made Amalafrid a general and married off his sister Rodelinda to the Lombard king Audoin . When the Lombards applied to the Byzantine Emperor Justinian I for help against the Gepids , he sent an army under the command of Justinus and Justinianus , the sons of Germanus ; Aratius and Suartuas ( a former ruler of the Heruli ) ; and Amalafrid . All the former remained in Ulpiana , Illyria , to decide on a question of doctrine among the local Christians . Amalafrid led part of the Roman army against the Gepids . As Audoin afterwards sent envoys to Justinian to complain about the lack of Imperial help , this seems to have been only a small part of the original army . Nevertheless , Amalafrid and the Lombard host under Audoin won a major victory over the Gepids . Amalafrid had a son named Artachis ( see Venantius Fortunatus , Carm . App. 3 ) but nothing further is known of his fate .  - Amalaberga was the daughter of Amalafrida, daughter of Theodemir, king of the Ostrogoths. Her father is unknown, her uncle was Theodoric the Great. She married Hermanfrid, king of the Thuringii. They had a son named Amalafrid and a daughter Rodelinda, who married the Lombard king Audoin. According to Procopius (History of the Wars V, 13), after Hermanfrid's death, she fled with her children to her brother Theodahad who was at that time (534-36) King of the Ostrogoths.  - Alduin, Auduin, or Audoin (Langobardic: "Aldwin", or "Hildwin") was king of the Lombards from 546 to 560. Under him the Lombards became fœderati of the Byzantines (541), signing a treaty with Justinian I which gave them power in Pannonia and the north. Beginning in 551, Audoin was obliged to send troops to serve Narses in Italy in the Gothic War against the Ostrogoths. The next year (552), he sent over 5,000 men to defeat the Goths on the slopes of Vesuvius. That same year Audoin had been able to inflict a heavy defeat on the Gepids with the help of his brother-in-law Amalafrid: the Gepid king Thurisind lost his eldest son, Turismod, in the Battle of Asfeld during which the prince was killed by Alboin, son of Audoin.    What is the relationship between 'amalafrid' and '551'?
Answer:
date of death