After the death of Richard II's heir in 1113, Jonathan was installed as duke, with Richard as regent, by Prince Robert I of Capua.
ˈæftɚ ðə dˈɛθ ʌv ɹˈɪtʃɚd ɹˌoʊmən tˈuː ˈɛɹ ɪn wˈʌn θˈaʊzənd wˈʌnhˈʌndɹɪd θˈɜːtiːn, dʒˈɑːnəθən wʌz ɪnstˈɔːld æz dˈuːk, wɪð ɹˈɪtʃɚd æz ɹˈiːdʒənt, baɪ pɹˈɪns ɹˈɑːbɚt aɪ ʌv kˈæpjuːə.