Helena Unierzyska née Matejko (6 April 1867 – 11 October 1932), was a Polish painter and sculptor, daughter of Poland's national painter Jan Matejko and his wife Teodora Giebułtowska who often posed for his paintings.
His daughter Helena (one of their five children) is best remembered as the live model for a series of her father's symbolic portraits of girls, and less as an aspiring artist.
Helena often assisted her father in his painting trips and in his daily studio sessions.
On 24 June 1891 she married one of her father's students from the Academy of Fine Arts, painter Józef Unierzyski.
She had helped Polish victims in World War I and was awarded the Cross of Independence by president Stanisław Wojciechowski in the interwar period.