Quote Originally Posted by Sir Rethel of Retheley View Post
This could be IE influence.
Essentially non-existent except in some IE islands with stronk non-IE elements and most likely ascribable to Altaic/Turanian/Scythic invasions since prehistoric times, since "atta" in IE languages is only sparsely evident. Hypothetically related to Proto-Altaic *ĕ́t`č (“elder relative”), Proto-Dravidian *átai (“female relative (father's sister; grandmother)”) and Proto-Eskimo *ata-ata, *ata (“father”), Sumerian 𒀜𒁕 (AD.DA). Since Sumerian is the oldest attested word, its screams for Proto-Turks. However "pather" is the a more plausible word in IE, since we find regular forms in all IE dialects, which however is hypothetically related to Proto-Altaic *áp`a (“father”), Proto-Uralic *appe (“father-in-law”), Proto-Kartvelian *ṗaṗ- (“grandfather”), Proto-Dravidian *ápa- (“father (honorary)”) and Proto-Chukotko-Kamchatkan *'eppĕ- (“grandfather, elder relative”).