He was of the house of Gausi.
No dates area available for birth or marriage. His son's birth is often estimated as the year 530. This suggests an estimated marriage date of 529, and an estimated birth year of 510. Such dates are highly speculative and used only to place a person in the correct time period.
His mother was Menia. The Historia Langobardorum names "mater…Audoin…Menia uxor fuit Pissæ regis". This wording suggests that "Pissæ regis" was not the father of Audoin, presumably Menia's second husband. It is assumed that "Pissæ" indicates that he was king of a tribe of that name. 
Audoin married firstly Rodelinda (Roddenda). Her parents are not known. The Origo Gentis Langobardorum names "Roddenda" as mother of "Albuin filius [Auduini]". 
The Historia Langobardorum names "Rodelenda" as mother of Alboin. Paulus Diaconus names "Rodelindam" as wife of Audoin and mother of Alboin. 
Audoin married secondly a daughter of Herminafrid, King of the Thuringians and his wife Amalaberga the Ostrogoth. Procopius records that "Amalafridus, vir Gotthus, ex filia nepos Amalafridæ sororis Theoderici Gotthorum regis et filius Hermenefridi regis Thoringorum…sororem eius” married "Anduino Langobardorum regi". The Codex Theodosianus records that the daughter of Amalaberga became the second wife of King Audoin.
He married secondly Unknown Thuringii whose parents were Amalaberga of the Ostrogoths and Hermanfrid, king of the Thuringii) 
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.
He reigned from 546 to 560. He was preceded by Walthari and followed by Alboin.
He was installed as Audoin King of the Lombards in Hungary in succession to King Walthari. The Origo Gentis Langobardorum records that "Auduin" reigned after Walthari, specifying that he brought the Lombards into Pannonia and, in a later passage, stating that they remained in Pannonia for 43 years. 
Byzantium encouraged the Lombards to consolidate their position in Pannonia by granting them the city of Noricum and other strongholds, although it is reported that they celebrated by raiding Dalmatia and Illyricum. 
The war with the Gepids, which started in, was settled by a peace treaty imposed by Emperor Justinian in 552, under which the Lombards sent troops to Italy to help Narses rout the Ostrogoths. 
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.
Audoin died in 560 in Pannonia. 
Audoin died in Pannonia in 560. The Historia Langobardorum names "Audoin ex genere…Gausus" and his mother "Menia uxor…Pissæ regis".  The Historia Langobardorum records that Audoin died in Pannonia. 
Audoin died in 563 or 565 and was succeeded by his son, Alboin, who brought the Lombards into Italia. 
King Audoin & his first wife had two children:
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