kˈævəndˌɪʃ wʌz bˈɔːɹn ɪn lˈʌndən, ðə sˈɛkənd sˈʌn ʌv wˈɪljəm kˈævəndˌɪʃ, θˈɜːd dˈuːk ʌv dˈɛvənʃɚ ænd hɪz wˈaɪf, ðə fˈɔːɹmɚ kˈæθɹɪn hˈɑːskɪnz.
Cavendish was born in London, the second son of William Cavendish, 3rd Duke of Devonshire and his wife, the former Catherine Hoskins.