Md. Code, Estates and Trusts § 5–106

(a) (1) Subject to paragraph (2) of this subsection and subsection (b) of this section, when there are several eligible persons in a class entitled to letters, the court or register may grant letters to one of them, or to more than one of them, as necessary or convenient for the proper administration of the estate.

(2) Subject to § 5–105 of this subtitle, all personal representatives named in the will or nominated in accordance with a power conferred in the will are entitled to probate.

(b) Within classes (3) through (10) of § 5–104 of this subtitle, letters may be granted to two or more persons in different classes provided that the person or class first entitled to letters consents.