There was a terrible Rakshasi, by name Jara, possessed of dreadful mighty. She, O monarch, had put together the different parts of Jarasandha's body and therefore was the latter so named.
तत्र सा राक्षसी घोरा जरानाम्नी सुविक्रमा। संदधे सा हि संजातं जरासंधमरिंदमम्॥