Haw. Rev. Stat. § 668-5
The summons shall be directed to all persons named in the complaint or joined as provided by the rules of court, and may be directed generally to all persons unknown having or claiming to have any interest in the premises described in the complaint, subject to section 668-8.5. Unknown persons and any known persons who do not reside within the State[,] or cannot for any reason be served with process within the State, shall have notice of the action as provided by sections 634-23, 634-24, and 634-26. If the summons has been directed generally to all persons unknown as above provided, and if service has been made upon persons known and unknown as required, the court shall have jurisdiction to proceed as though all persons interested in the premises were in being and personally served, but any adjudication shall, as regards a defendant served as provided by sections 634-23, 634-24, and 634-26, affect only the property which is the subject of the action except as provided by section 634-23.
HRS § 668-5
Rules of Court
Summons, service, see HRCP rule 4. Unidentified defendants, see HRCP rule 17(d).
Guardian ad litem.34 Haw. 854;35 Haw. 262.
Publication of summons, how made, see § 601-13. Guardians ad litem, see § 551-2.