Malakbel's name means "Angel of Bel", attesting to his mythological role as Bel's messenger and acolyte.
Archaeological evidence
The earliest known mention of Malakbel was an inscription which dates back to 17 BC and associates him with the lunar god Aglibol. Several other inscriptions made by the Bene Komare also associate him with Aglibol, including a bilingual inscription from 122 AD in which Aglibol and Malakbel sponsor a citizen by the name of Manai for his piety. Attestations of Malakbel's worship can be found in Rome, and as far as the province of Numidia in north Africa, as attested by a circa 178 AD inscription in the town of El Kantara, where Palmyrene archers were stationed.
Sanctuaries
In Palmyra
Several 2nd century AD inscriptions from the city attest that Aglibol was venerated with Malakbel in a sanctuary known as the "Sacred Garden" or "Holy Garden", which was one of the four principle sanctuaries of the city. The Bene Komare, well known devotees of the gods Malakbel and Aglibol, tended to this sanctuary. The sanctuary had two altars, and a sacred cypress. One of the reliefs found in the Temple of Bel show the sanctuary's two altars and depictions of the two gods. The sanctuary also had a bath, as attested by an 182 AD inscription mentioning Thomallachis, daughter of Haddudan, who contributed 2500 denarii towards the construction of the bath of Aglibol and Malakbel.
In Rome
A shrine of Malakbel is attested around the early 2nd century AD in Rome. The shrine was located on the right bank of the Tiber river, in the vicinity of several wine warehouses. There, Malakbel was frequently identified with the Roman divinity Sol, known as Deus Sol Sanctissimus, and occasionally bore the epithet "Invictus".
In 274, following his victory over the Palmyrene Empire, emperor Aurelian dedicated a large temple to Sol Invictus in Rome; most scholars consider Aurelian's Sol Invictus to be of Syrian origin, either a continuation of the cult of Sol Invictus Elagabalus, or Malakbel of Palmyra, as Malakbel was frequently identified with the Roman god Sol and bore the epithet Invictus. Another one of his names, "Sanctissimus", was an epithet Aurelian bore on an inscription from Capena. The relation between Malakbel and Sol Invictus, if any, can not be confirmed and will probably remain unresolved.