Marquesses | Titles by Rank
- Marquesses of Heuchin
- Marquesses of Hijosa de Alava
- Marquesses of Hinojares
- Marquesses of Hoensbroech
- Marquesses of Houécourt
- Marquesses of Hoyos
- Marquesses of Huétor de Santillán
- Marquesses of Humeroeuille
- Marquesses of Huntly
- Marquesses of Ibias
- Marquesses of Illiers
- Marquesses of Imécourt
- Marquesses of Inhambupé
- Marquesses of Iniza
- Marquesses of Irache
- Marquesses of Iria Flavia
- Marquesses of Isasi
- Marquesses of Isches
- Marquesses of Isla Hermosa
- Marquesses of Isla Roja
- Marquesses of Isle of Ely
- Marquesses of Isles
- Marquesses of Isoard de Chénerilles
- Marquesses of Isoard de Chénerilles
- Marquesses of Itanhaém
- Marquesses of Itu
- Marquesses of Iturbieta
- Marquesses of Ivanrey
- Marquesses of Iznate
- Marquesses of Jabalquinto
- Marquesses of Jacarepaguá
- Marquesses of Jácome Correia
- Marquesses of Jalesnes
- Marquesses of Jamaica
- Marquesses of Janson
- Marquesses of Jaral del Berrio
- Marquesses of Jarandilla
- Marquesses of Jaraquemada
- Marquesses of Jaryé
- Marquesses of Jerez de los Caballeros
- Marquesses of Jodar
- Marquesses of Joffreville
- Marquesses of Juigné
- Marquesses of Juliá
- Marquesses of Juliana
- Marquesses of Juliers
- Marquesses of Jumilhac
- Marquesses of Jundiaí
- Marquesses of Jura Real
- Marquesses of Jústiz de Santa Ana