Old Norse fǫðursystir

← Old Norse faðir (compound)

← Old Norse systir (compound)

→ Danish faster (derived)

→ Westrobothnian farsöster (inherited)

→ Norwegian Nynorsk faster (inherited)

→ Norwegian Nynorsk farsyster (cognate)

→ Norwegian Nynorsk farsøster (cognate)

→ Elfdalian faster (derived)

→ Swedish faster (inherited)