mˈæɡnəs dᵻsˈɛntɪəs dˈaɪd ˈeɪtiːn ˈɔːɡəst θɹˈiːhˈʌndɹɪd fˈɪfti θɹˈiː wʌz sˈiːzɚɹ ʌvðə wˈɛstɚn ɹˈoʊmən ˈɛmpaɪɚ fɹʌm θɹˈiːhˈʌndɹɪd fˈɪfti tə θɹˈiːhˈʌndɹɪd fˈɪfti θɹˈiː, ˌʌndɚ hɪz bɹˈʌðɚ mæɡnˈɛntɪəs.
Magnus Decentius (died 18 August 353) was caesar of the Western Roman Empire from 350 to 353, under his brother Magnentius.