Catalan ou

← Spanish huevo (cognate)

← French œuf (cognate)

← Proto-Indo-European *h₂ōwyóm (inherited)

← Italian uovo (cognate)

← Proto-Italic *ōwom (inherited)

← Latin ōvum (inherited)

← Occitan uòu (cognate)

← Romanian ou (cognate)

→ Catalan oval (suffix)

→ French œuf (cognate)

→ Friulian ûf (cognate)

→ Occitan uòu (cognate)

→ Sardinian ou (cognate)

→ Sardinian ovu (cognate)

→ Sardinian obu (cognate)