What about Ena's children? I know that the sons had the disease but what about the daughters. Were they carriers?
Alfonso and Ena had seven children:
Infante Alfonso Pio Cristino Eduardo Francisco Guillermo Carlos Enrique Fernando Antonio Venancio of Spain, Prince of Asturias (1907–1938), a hemophiliac, he renounced his rights to the throne in 1933 to marry a commoner, Edelmira Ignacia Adriana Sampedro-Robato, and became Count of Covadonga. He later remarried to Marta Esther Rocafort y Altazarra, but had no issue by either of them.
Infante Jaime Luitpold Isabelino Enrique Alberto Alfonso Victor Acacio Pedro Maria of Spain (1908–1975), a deaf-mute as the result of a childhood operation, he renounced his rights to the throne in 1933 and became Duke of Segovia, and later Duke of Madrid, and who, as a legitimist pretender to the French throne from 1941 to 1975, was known as the Duke of Anjou.
Infanta Beatríz Isabela Federica Alfonsa Eugenia Cristina Maria Teresa Bienvenida Ladisláa of Spain (1909–2002), who married Don Alessandro Torlonia, 5th Prince di Civitella-Cesi.
Infante Fernando, stillborn (1910)
Infanta Maria Cristina Teresa Alejandra Guadalupe Maria de la Concepción Vittoria Eugenia of Spain (1911–1996), who married Enrico Eugenio Marone-Cinzano, 1st Conte di Marone.
Infante Juan Carlos Teresa Silvestre Alfonso of Spain (1913–1993), named heir to the throne and Count of Barcelona, whose son is the current King, Juan Carlos I of Spain.
Infante Gonzalo Manuel Maria Bernardo Narciso Alfonso Mauricio of Spain (1914–1934), a hemophiliac, like his elder brother Alfonso. He died due to bleeding from injuries suffered in a car crash.