sentences:  His known sibling was his younger paternal half-sister Erato who was born to another unnamed woman.Although Tigranes IV was the namesake of his father, the name "Tigranes" was the most common royal name in the Artaxiad Dynasty and was among the most ancient names of the Armenian Kings.Tigranes IV was born and raised either in Rome where his father lived in political exile for 10 years from 30 BC until 20 BC or during his father's Kingship of Armenia in which he ruled from 20 BC until 8 BC.