Proto-Turkic *kuĺ

→ Southern Altai куш (inherited)

→ Azerbaijani bayquş (mention)

→ Azerbaijani quş (inherited)

→ Chagatai قوش (inherited)

→ Crimean Tatar kuş (inherited)

→ Persian قوش (derived)

→ Kazakh құс (inherited)

→ Kyrgyz куш (inherited)

→ Ottoman Turkish قوش (inherited)

→ Ottoman Turkish بايقوش (mention)

→ Old Turkic 𐰴𐰆𐰽 (inherited)

→ Yakut кус (inherited)

→ Turkish kuş (inherited)

→ Turkish baykuş (mention)

→ Tuvan куш (inherited)

→ Uyghur قۇش (inherited)

→ Uzbek qush (inherited)