Bodrum Otogar
There is no single agreed explanation for the modern name. Several hypotheses rest on historical sources, local tradition, language change, and ancient buildings.
1. Saint Peter and the “Petrum” theory
A common view connects the name to Bodrum Castle, dedicated to Saint Peter. In Latin it was called “Sanctum Petrum” (holy Peter’s castle). Over time “Sanctum” dropped out and the place was referred to simply as “Petrum”.
Under this theory the name evolved roughly as:
Petrum → Potrum → Bodrum
Note: “Petrum” and “Petronium”
Latin sources do not use one form only. “Petrum” referred to the fortress, while “Petronium” described the wider area around the castle and settlement — a normal distinction in medieval geography.
In short:
Petrum = the castle
Petronium = the castle’s surroundings
Some authors suggest a chain such as “Petronium” → “Poturum” → “Bodurum” → “Bodrum”. That remains a hypothesis, not a proven linguistic chain.
2. Hippodrome and other ancient monuments
Another view holds that Turkish speakers in Anatolia used the word “bodrum” loosely for large ancient ruins, especially stadiums and hippodromes.
Popular etymology then imagines:
Hippodrome → Podrum → Bodrum
Some two thousand years ago the civic centre and hippodrome of Halicarnassus lay where Bodrum’s industrial zone and the old bus station are today.
3. Underground spaces
Because “bodrum” in modern Turkish means a basement or cellar, some connect the place name to underground storerooms and shelters among the castle and ancient ruins.
That link is suggestive but, like the others, not proven.
4. Historical texts
Barbarossa’s Gazavatname uses the form “Bodurum”, sometimes in the sense of a dungeon.
Scholars have proposed Greek “batrum” or Aramaic “Batrun” as distant parallels; nothing is certain.
5. “Sıravolos” in the Ottoman period
In the 16th century Piri Reis called the Bodrum peninsula “Sıravolos” (or Isravolos) — an administrative or regional label for the whole shore with its harbours.
Conclusion
The name probably reflects several layers of history rather than one neat story. Taken together, the theories show how place names can shift across languages and centuries.