Here are some other possible translations, depending on the context:
* Dayuhan: This means "foreigner" or "alien" and can also be used for "stranger" in some contexts.
* Hindi kakilala: This is another literal translation meaning "not acquainted".
* Wala sa pamilyang: This means "not in the family" and can be used to refer to someone outside your circle of friends and family.
The best translation will depend on the specific situation.