The classical name Tauris or Taurica is from the Greek Ταυρική, after the peninsula's Scytho-Cimmerian inhabitants, the Tauri.
Strabo (Geography vii 4.3, xi.2.5), Polybius, (Histories 4.39.4), and Ptolemy refer to the Strait of Kerch as the Κιμμερικὸς Βόσπορος (romanized spellings, Kimmerikos Bosporos, Bosporus Cimmerius), and to Cimmerium as the capital of the Taurida, whence the peninsula, and so also its easternmost part was named Promontorium Cimmerium (Κιμμέριον Ἄκρον).
In English usage since the early modern period the Crimean Khanate is referred to as Crim Tartary. The Italian form Crimea (and "Crimean peninsula") also becomes current during the 18th century, gradually replacing the classical name of Tauric Peninsula in the course of the 19th century. The omission of the definite article in English ("Crimea" rather than "the Crimea") became common during the later 20th century.
The name "Crimea" follows the Italian form from the Crimean Tatar name for the city Qırım (today's Stary Krym) which served as a capital of the Crimean province of the Golden Horde. The name of the capital was extended to the entire peninsula at some point during Ottoman suzerainty. The origin of the word Qırım is uncertain. Suggestions argued in various sources include:
a derivation from the Turkic term qirum ("fosse, trench"), from qori- ("to fence, protect").
Other suggestions that have not been supported by sources but are apparently based on similarity in sound include:
a derivation from the GreekCremnoi (Κρημνοί, in post-classical Koiné Greek pronunciation, Crimni, i.e., "the Cliffs", a port on Lake Maeotis (Sea of Azov) cited by Herodotus in The Histories 4.20.1 and 4.110.2). However, he identifies the port not in Crimea, but as being on the west coast of the Sea of Azov. No evidence has been identified that this name was ever in use for the peninsula.
The Turkic term is related to the Mongolian appellation kerm "wall", but sources indicate that the Mongolian appellation of the Crimean peninsula of Qaram is phonetically incompatible with kerm/kerem and therefore deriving from another original term.