Brockhaus-1809: Marcus Attilius Regulus
Brockhaus-1911: Regulus [3] · Regulus [2] · Regulus
Heiligenlexikon-1858: Regulus, S.S. (1-2) · Regulus, S.S. (4) · Regulus, S. (5) · Regulus (6) · Regulus, S. (3)
Herder-1854: Regulus [2] · Regulus [1]
Meyers-1905: Regŭlus [2] · Regŭlus [1] · Regulus
Pierer-1857: Saphĭrus regŭlus · Regŭlus [2]