Old Norse tíu

← Proto-Germanic *tehun (inherited)

← Proto-Indo-European *déḱm̥ (inherited)

→ Danish ti (inherited)

→ Faroese tíggju (derived)

→ Old Swedish tio (inherited)

→ Old High German zehan (mention)

→ Icelandic tíu (derived)

→ Norwegian Bokmål ti (inherited)

→ Norwegian Nynorsk ti (inherited)

→ Old Norse áttatíu (compound)

→ Old Norse tigr (mention)

→ Elfdalian tiu (derived)

→ Swedish tio (derived)