Old Norse systir

← Old English sweoster (cognate)

← Proto-Germanic *swestēr (derived)

← Proto-Norse ᛊᚹᛖᛊᛏᚨᚱ (inherited)

← Old High German swester (cognate)

← Proto-Indo-European *swésōr (derived)

← Old Saxon swestar (cognate)

→ English sister (cognate)

→ Old English sweostor (cognate)

→ Middle English suster (cognate)

→ Faroese systir (derived)

→ Westrobothnian söster (inherited)

→ Old Danish systær (inherited)

→ Old Swedish systir (inherited)

→ Old High German swester (cognate)

→ Icelandic systir (derived)

→ Norwegian Bokmål søster (inherited)

→ Norwegian Nynorsk søster (inherited)

→ Norwegian Nynorsk syster (inherited)

→ Old Norse fǫðursystir (compound)

→ Scots sister (cognate)

→ Swedish syster (inherited)