Final answer:
The text only mentions Gustavo Alacran's youngest daughter who is eighteen, but does not provide information about his wife or other children.
Step-by-step explanation:
In the context provided, it appears that the character of Gustavo Alacran, also known as El Viejo, is mentioned as having a daughter who has just turned eighteen. However, there is no direct mention of Gustavo Alacran's wife, nor any additional children aside from his youngest daughter within the excerpt given. Without additional information from the original source material, it is not possible to provide the names or details about El Viejo's wife or any other children they may have.