Ibu² Kodam V Djajakarta

Ibu² Kodam V Djajakarta => Ladies* of Kodam V Djajakarta, presumed to be the name of this angklung ensemble (*literal meaning of "Ibu" is mother, but it might also be used to formally address older women as a sign of respect)
the "Kodam V Djajakarta" in the name refers to Kodam Jayakarta (the Jakarta Raya Military Regional Command), and the "V" stands for "5" (referring to the 5th Regional Military Command/Jayakarta, one of its other names)