Definition from Wiktionary, the free dictionary
From Proto-Germanic *faþō, *faþǭ (“father's sister”), from Proto-Indo-European *ph₂tḗr (“father”). Akin to Old Frisian fethe (“father's sister, aunt”), Middle Low German vade (“father's sister”), Old English fæder (“father”).
- father's sister, paternal aunt
Declension of faþu (strong ō-stem)