Manfred, Prince of Otranto, had one son and one daughter: the latter, a most beautiful virgin, aged eighteen, was called Matilda. Conrad, the son, was three years younger, a homely youth, sickly, and of no promising disposition; yet he was the darling of his father, who never showed any symptoms of affection to Matilda. Manfred had contracted a marriage for his son with the Marquis of Vicenza's daughter, Isabella; and she had already been delivered by her guardians into the hands of Manfred, that he might celebrate the wedding as soon as Conrad's infirm state of health would permit.
In "The Castle of Otranto," Manfred, the lord of Otranto, has two children: his daughter Matilda, an exceptionally beautiful eighteen-year-old virgin, and his son Conrad, who is three years younger and physically unappealing. Despite Conrad's unpromising nature and illness, he is the favored child of Manfred, who shows little affection toward Matilda.
Manfred has arranged a marriage for Conrad with Isabella, the daughter of the Marquis of Vicenza. This alliance is solidified, as Isabella has been entrusted to Manfred by her guardians, and he intends to proceed with the wedding as soon as Conrad's health allows it.