Barons | Titles by Rank
- Barons of Itaquatiá
- Barons of Itaqueri
- Barons of Itaqui
- Barons of Itatiaia
- Barons of Itatiba
- Barons of Itaúna
- Barons of Itiúba
- Barons of Itu
- Barons of Ivaí
- Barons of Iveagh
- Barons of Ivinheima
- Barons of Jaboatão
- Barons of Jacaraí
- Barons of Jacareí
- Barons of Jaceguaí
- Barons of Jacuí
- Barons of Jacuípe
- Barons of Jacutinga
- Barons of Jaguará
- Barons of Jaguarão
- Barons of Jaguarari
- Barons of Jaguarari-I
- Barons of Jaguari
- Barons of Jaguaripe
- Barons of Jambeiro
- Barons of Jannace
- Barons of Japaratuba
- Barons of Japi
- Barons of Japurá
- Barons of Jaraguá
- Barons of Jaraú
- Barons of Jardim do Mar
- Barons of Jari
- Barons of Jarnac
- Barons of Jauru
- Barons of Javari
- Barons of Javari-I
- Barons of Javel
- Barons of Jeltsch
- Barons of Jeltz
- Barons of Jequiá
- Barons of Jequiriçá
- Barons of Jequitaí
- Barons of Jeremoabo
- Barons of Jerphanion
- Barons of Joane
- Barons of Joatinga
- Barons of Joncret
- Barons of Joyosa-Guarda
- Barons of Jozan