Why are some of Infante Alfonso's middle names hyphenated and others are not?
Infante Alfonso Maria Isabel Francisco Eugenio Gabriel Pedro Sebastian Pelayo Fernando Francisco de Paula Pio Miguel Rafael Juan José Joaquin Ana Zacarias Elisabeth Simeón Tereso Pedro Pablo Tadeo Santiago Simon Lucas Juan Mateo Andrès Bartolomé Ambrosio Geronimo Agustin Bernardo Candido Gerardo Luis-Gonzaga Filomeno Camilo Cayetano Andrès-Avelino Bruno Joaquin-Picolimini Felipe Luis-Rey-de-Francia Ricardo Esteban-Protomartir Genaro Nicolas Estanislao-de-Koska Lorenzo Vicente Crisostomo Cristano Dario Ignacio Francisco-Javier Francisco-de Borja Higona Clemente Esteban-de-Hungria Ladislado Enrique Ildefonso Hermenegildo Carlos-Borromoeo Eduardo Francisco-Régis Vicente-Ferrer Pascual Miguel-de-los-Santos Adriano Venancio Valentin Benito José-Oriol Domingo Florencio Alfacio Benére Domingo-de-Silos Ramon Isidro Manuel Antonio Todos-los-Santos de Borbón of Spain
They are full saints names, it seems like (which also explains why several names are repeated more than once, like Francisco and Luis).
So Francisco de Paula is named after the Italian saint Francis of Paola
Luis-Gonzaga is the Italian saint Aloysius of Gonzaga
Andrès-Avelino is the Italian saint Andrea Avellino
Joaquin Picolimini is the Italian saint Joachim of Siena
Luis-Rey-de-Francia is King Louis IX of France, who was sainted
Estanislao de Koska is Polish boy saint Stanislaus Kostka
Francisco Javier is the Navarese saint Francis Xavier (I see this name pop up in a lot of Austrian and French royals as Franz Xaver and Francois Xavier)
Francisco de Borja is the Spanish saint Francisco de Borja
Francisco Regis is the French saint Jean Francois Regis
Vincente Ferrer is the Valencian saint Vicent Ferrer
Jose Oriol is the Spanish saint Josep Oriol
Domingo de Silos is the Spanish saint Dominic of Silos (Infanta Elena has the feminine version of this saint as her fourth middle name)
The only one I'm not sure about is Miguel de los Santos, but that could be there to represent the angel Michael?