Unknown people are individuals who are not known or recognized by others. They may be strangers, acquaintances, or even family members who have not been identified. Strangers are people who are not familiar to the individual and may not have any prior contact with them. Acquaintances are people who are known to the individual but may not be close friends or family members. Family members who are unknown may be distant relatives or those who have been estranged from the family for a long period of time.