Castar as a Baby Name. Meaning and Origin of Castar

What is the meaning of the name Castar ?

The baby name Castar is a Male name , 2 syllables long and is pronounced /ˈkæs.tɑr/ or /ˈkæs.tər/ (CAS-tar).

Castar is in Origin.

Castar is a modern variant related to Castor, ultimately from Greek Kástōr, “beaver,” the name of one of the Dioscuri (Castor and Pollux). Through Latin, the form Castor spread across Europe; Spanish and Portuguese keep Cástor, while French and English use Castor. The spelling Castar likely arose as a creative respelling or as a blend hinting at “star,” which adds a celestial undertone to the mythic heritage.

As a given name, Castor appears in late antiquity and the Middle Ages, aided by saints such as Castor of Karden and Castor of Apt; Castar itself remains rare and contemporary. Variant forms include Castor, Cástor, Kastor, and Caster; feminine counterparts are Castora and Cástora. Short forms and nicknames include Cas, Cass, and Star. The meaning centers on “beaver” but culturally evokes bravery, seamanship, protection of travelers, and loyal brotherhood, drawn from the Dioscuri’s patronage.

⚙ Castar is a rare name. It doesn't appear in any of the major national birth registries we track; we found only 22 recorded uses across 5 countries. Expect very few children to share this name.