Bosses in Twilight Princess

Mini-boss Appendix

 * Ook (and Baba Serpents) – Forest Temple
 * King Bulblin
 * Dangoro – Goron Mines
 * Shadow Kargarok Rider – Lake Hylia (drained)
 * Twilit Bloat – Lake Hylia (filled)
 * Deku Toad (and Toados) – Lakebed Temple
 * Skull Kid (and Puppets) – Sacred Grove
 * Death Sword – Arbiter's Grounds
 * Darkhammer – Snowpeak Ruins
 * Darknut – Temple of Time
 * Aeralfos – City in the Sky
 * Phantom Zant – Palace of Twilight

Boss Appendix

 * Twilit Parasite: Diababa
 * Twilit Igniter: Fyrus
 * Twilit Aquatic: Morpheel
 * Twilit Fossil: Stallord
 * Twilit Ice Mass: Blizzeta
 * Twilit Arachnid: Armogohma
 * Twilit Dragon: Argorok
 * Usurper King Zant
 * Ganon's Puppet Zelda
 * Dark Beast Ganon
 * Dark Lord Ganondorf

Boss Names
The dungeon bosses of each have names that are twists on other names, with the exception of the bosses of the Palace of Twilight and Hyrule Castle:

Diababa is a portmanteau of Baba, a term used in series to refer to hostile flora, and diabolic

Fyrus is a portmanteau of Darbus, which is the name of the Goron patriarch who was transformed into Fyrus, and fyr, Old English for fire.

Morpheel is portmanteau of Morpha, the boss of the Water Temple in, and eel.

Stallord is a combination of the prefix stal-, a prefix used in series to refer to animated skeletons, and the suffix -lord.

Blizzeta is a portmanteau of Yeta, the female Yeti who becomes Blizzeta, and blizzard

Armogohma is a portmanteau of armor, and/or Armos, for the large statues used to defeat her, and Gohma, the arthropod-like boss that appears in several other  games.

Argorok is a portmanteau of Kargarok, the bird-like enemy that is common throughout the game, and armor.