Alexandros I.
Alexandros I designates the following persons:
- Ptolemy X , Pharaoh of Egypt from the Ptolemy dynasty around 100 BC Chr.
- Alexander I (Bishop of Rome) , († 115), Bishop of Rome
- Alexander of Alexandria († 328), Bishop of Alexandria
- Alexander (Greece) (1893–1920), King Alexandros I of Greece from 1917 to 1920
