The Szydłowiecki (plural: Szydłowieccy, feminine form: Szydłowiecka) was a Polish szlachta (nobility) family. A branch of the House of Odrowąż. Magnates in the Kingdom of Poland and the First Republic of Poland.
Their family nest was Szydłowiec at the Korzeniówka river near Radom in Masovia.
House of Szydłowiecki Wikipedia
The Szydłowiecki family used the Odrowąż coat of arms.