Theobald I was the son of Theobald the Elder of Blois, who from 908 on was Viscount of Tours,  and of Richildis, which origins are discussed.
θiːəbˈɔːld aɪ wʌzðə sˈʌn ʌv θiːəbˈɔːld ðɪ ˈɛldɚɹ ʌv blˈɔɪz, hˌuː fɹʌm nˈaɪnhˈʌndɹɪd ˈeɪt ˌɔn wʌz vˈaɪkaʊnt ʌv tˈʊɹz,  ænd ʌv ɹɪtʃˈaɪldiz, wˌɪtʃ ˈɔːɹɪdʒˌɪnz ɑːɹ dɪskˈʌst.