Maria Vorontsova - Wikipedia
Katerina Tikhonova (sister) Maria Vorontsova (Russian: Мария Воронцова, née Mariya Vladimirovna Putina, Мария Владимировна Путина; born 28 April 1985), also referred to as Maria Faassen, [1] [2] is a Russian pediatric endocrinologist. [3] She is the eldest child of Russian president Vladimir Putin. [1] [4]