There are multiple origins and translations for the name Bat:
1. Diminutive form of the name Bartholomew or of Bartley
2. Mongolian (бат ᠪᠠᠲᠤ) name-forming means - "firm, strong, hard, solid; royal".
The most popular Mongolian given name.
3. Old English from Germanic.
May also refer to Bat (feminine name )