Estonian isa

← Finnish isä (cognate)

← Proto-Finnic *icä (inherited)

← Hungarian ős (cognate)

← Proto-Uralic *ićä (inherited)

→ Estonian isadus (affix)

→ Estonian isamaa (compound)

→ Estonian vanaisa (compound)

→ Estonian isand (suffix)

→ Finnish isä (cognate)

→ Hungarian ős (cognate)

→ Ingrian izä (cognate)

→ Livonian izā (cognate)