The Doric Greek word *τύρτος
Word *τύρτος
t y. r t o ς
IPA ty.rtoς
Meaning fourth
See also Tocharian B: śtarte ‘fourth’
Phrygian: *ΔΙΘΥΡ ‘four’

Comments
Václav Blažek (2010)

Reconstructed from Τυρταίος 'born on the fourth day'