The name Alexander could refer to the following:
- Alexander (Halo: Evolutions) - A high school English teacher on Earth in the late 25th century.
- Alexander (Halo Wars) - The former civilian captain of the UNSC Spirit of Fire.
- Alexander Reaves - A Vice Admiral in the UNSC Navy during 2552.
- Alexander Seropian - The initial founder, president and CEO of Bungie.
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