Old Portuguese fillo

← Old French fil (cognate)

← Proto-Indo-European *dʰeh₁y-li-os (inherited)

← Old Latin fīlios (inherited)

← Latin fīlius (inherited)

← Mozarabic filyo (cognate)

← Old Spanish fijo (cognate)

← Old Occitan filh (cognate)

→ Galician fillo (inherited)

→ Mozarabic فيليه (cognate)

→ Old Spanish fijo (cognate)

→ Portuguese filho (inherited)

→ Portuguese fidalgo (mention)