Ruiz de Alarcón, Juan Syllabification: (Ru·iz de A·lar·cón, Juan)Pronunciation: /ro͞oˈēs dā ˌälärˈkōn/Definition of Ruiz de Alarcón, Juan (1580–1639), Spanish playwright, born in Mexico City; full name Juan Ruiz de Alarcón y Mendoza.