The Ionic Greek word άτταγος
Word άτταγος
a t t a ɟ o ς
IPA attaɟoς
Meaning he-goat, male leader of a goat group
See also Proto-Indo-European: *hₐeiĝs ‘goat’

Comments
Etym. from αττα = 'father' + άγος = 'goat'

ag- is PIE for goat, while atta was inherited in Ionian Greek from the anatolian substratum.

Attagos survived in it's modern form as τράγος (tragos), where the first and second 'α' was dropped.