List of Famous people with last name Old

Gorm the Old, also called Gorm the Languid, was ruler of Denmark, reigning from c.  936 to his death c.  958 or a few years later. He ruled from Jelling, and made the oldest of the Jelling Stones in honour of his wife Thyra. Gorm was born before 900 and died perhaps around 958 or possibly 963 or 964.

Mieszko III the Old, of the Piast dynasty, was Duke of Greater Poland from 1138 and High Duke of Poland, with interruptions, from 1173 until his death.

Sigismund I the Old was King of Poland and Grand Duke of Lithuania from 1506 until his death in 1548. Sigismund I was a member of the Jagiellonian dynasty, the son of Casimir IV and younger brother of kings John I Albert and Alexander I Jagiellon. He was nicknamed "the Old" in later historiography to distinguish him from his son and successor, Sigismund II Augustus.

Konrad III the Old was a Duke of Oleśnica, Koźle, half of Bytom and half of Ścinawa since 1377.

Mikalojus Radvila or Mikolaj I nicknamed the Old was a Lithuanian noble. He was known after a patronym Radvilaitis, made of his father's name Radvila, which in turn became a family name of his heirs, Radvilos, which later polonised as Radziwiłł.

Emund the Old or Edmund was King of Sweden from c. 1050 to c. 1060. His short reign was characterised by disputes with the Archbishopric of Bremen over church policies, and a historically debated delimitation of the Swedish-Danish border.

Lloyd John Old was one of the founders and standard-bearers of the field of cancer immunology. When Old began his career in 1958, tumor immunology was in its infancy. Today, cancer immunotherapies are emerging as a significant advance in cancer therapy.

Harald Valdarsson, also known as Harald the Old appears only by name in Hversu Noregr byggðist, but his father, sons and their descendants played a central role in the politics of Scandinavian legends.