Łuk (Polish for "Bow") is a Polish coat of arms. It was used by several szlachta ( noble ) families under the Polish–Lithuanian Commonwealth.

Notable bearers of this coat of arms have included:

• J. Lyčkoŭski. "Belarusian Nobility Coats of Arms". (in English)

• Polish heraldry
• Heraldry
• Coat of arms

• Dynastic Genealogy
• Ornatowski.com