Answer
Based on official Jordanian legal texts
Guardianship (wilāya) under Jordanian law is a lawful authority the law grants to a qualified person to care for the affairs of a minor or person of deficient capacity, over his person or his funds. Article 223 of the Personal Status Law provides that a minor's guardian is his father, then the father's appointed trustee, then the true grandfather, then the grandfather's trustee, then the court or the trustee the court appoints.
Guardianship is tied to a person's capacity: Article 203 sets the age of majority at eighteen solar years, and Article 204 provides that one lacking or deficient in capacity cannot exercise his rights himself. Guardianship includes, under the following articles, guardianship over the person by overseeing the minor's affairs under Article 184, and guardianship over funds by managing and preserving them.
Article 224 requires the guardian to be of sound mind, full age, trustworthy, and able to discharge the requirements of guardianship, and Article 235 subjects the trustee's actions to the court's oversight.
Assessing whether guardianship exists and its conditions remains within the Sharia Court's competence on the facts of each case.
This is a general explanation based on Jordanian Personal Status Law and does not replace advice from a qualified lawyer in a specific dispute.