Drusilla f
From a Late Latin name, a feminine diminutive of the old Roman family name Dr(a)usus, which was first taken by a certain Livius, who had killed in single combat a Gaul of this name and, according to a custom of the time, took his victim's name as a cognomen. Of the several women in the Roman imperial family who were called Livia Drusilla, the most notorious was Caligula's sister and mistress. The name is borne in the Bible by a Jewish woman, wife of the Roman citizen Felix, who was converted to Christianity by St Paul (Acts 24: 24). In England it was taken up as a given name in the 17th century as a result of the biblical mention.
First names dictionary. 2012.