sɜːvˈɑːnteɪz skˈɑːlɚz kənsˈɪdɚ ðɪs æz hˈɛɹbɹˈeɪnd; sɜːvˈɑːnteɪz dɪdnˌɑːt ˈiːvən jˈuːs ðə sˈɛkənd sˈɜːneɪm sˈɑːvɛdɹə nˌɑːt hɪz bˈɜːθ nˈeɪm ʌntˈɪl hiː wʌz ɪn hɪz twˈɛnti z.
Cervantes scholars consider this as hare-brained; Cervantes did not even use the 2nd surname Saavedra (not his birth name) until he was in his 20s.