hɪz ˈɛldɪst bɹˈʌðɚ, dʒˈɑːn, mˈæɹid ðə dˈɔːɾɚɹ ʌv hjˈuː kˈɜːtənˌeɪ, ˈɜːl ʌv dˈɛvən, bˌʌt dˈaɪd ɪn wˈʌn θˈaʊzənd θɹˈiːhˈʌndɹɪd fˈɪfti ɪn hɪz fˈɑːðɚz lˈaɪftaɪm.
His eldest brother, John, married the daughter of Hugh Courtenay, Earl of Devon, but died in 1350 in his father's lifetime.