The Phrygian word ΟΤΥϝΟΙ
Word ΟΤΥϝΟΙ
o t u w o i
IPA otuwoj
Meaning eight
See also Greek: οκτώ ‘eight’
Armenian: owt ‘eight’
Lycian: aitãta ‘eight’
Proto-Indo-European: *hₓok̂tṓ(u) ‘eight’
Tocharian A: okät ‘eight’
Avestan: ašta ‘eight, 8’

Comments
e.g οτυFοι Fετει “in the 8 year”

See Jadranka Gvozdanović - Indo-European numerals

Other words that might be of interest
ΠΙΝΚΕ ‘five’, ϝΙΤΑΡΟΝ ‘second’, *ΔΙΘΥΡ ‘four’, *ΘΙΔΡΑ- ‘four’