Walentowicz is a Polish surname with a patronymic origin, meaning "son of Walenty". The suffix "-wicz" is a common Slavic patronymic indicator, equivalent to "-son" in English. The root name Walenty is the Polish form of the Latin name Valentinus, which is itself derived from the Roman cognomen Valens, meaning "strong, vigorous, healthy" in Latin. The name became prominent due to Saint Valentine (walentin-o-vich), a 3rd-century martyr whose feast day on February 14 became associated with love after being Christianized from the Roman fertility festival of Lupercalia. The humanistic name spread across Europe in various forms, including the English Valentine and the Czech Valenta. Though Walentowicz itself is not widely known outside Poland, its variants appear across Slavic and Germanic languages. Related surnames include Polish Walczak, Russian Valentinov and Valentinova, Czech Valenta, Slovak Valentová, English Valentine, and German Valentin. The feminine form remains unchanged in spelling (Walentowicz). Meaning: son of Walenty (from Latin Valentinus) Language/Culture: Polish Type: patronymic surname Pronunciation: /va.lɛnˈtɔ.vitʂ/ Related Names: Walenty, Walczak, Valentinov, Valentine