Md. Code, Real. Prop. § 14-613
Current with changes from the 2024 legislative session through Ch. 734, effective on or before 6/1/2024
In addition to the persons required to be named as defendants in an action under this subtitle, the plaintiff may name as defendants "all persons unknown, claiming any legal or equitable right, title, estate, lien, or interest in the property described in the complaint adverse to the plaintiff's title, or any cloud on the plaintiff's title to the property".
Md. Code, RP § 14-613