Thestias
Thestias or variant, may refer to:
- Ixias, an alternate name for this butterfly genus
 - Thestias (planet), an IAU-approved name for Pollux b
 - Thestius (Θέστιος), a name originating from Greek Mythology, whose patronymic form is "Thestias"
 
See also
- Scaptesyle thestias (S. thestias), a moth species
 - Potamanaxas thestia (P. thestia), a butterfly species
 - Compsodrillia thestia (C. thestia), a sea snail species
 - Anmenopsyche thestis (A. thestis), a moth species