Their eldest, Maria Vorontsova, was born in 1985. She studied biology at St Petersburg University and medicine at Moscow State University.
Mrs Vorontsova is now an academic, specialising in the endocrine system. She co-wrote a book on stunted growth in children, and is listed as a researcher at the Endocrinology Research Centre in Moscow.
She's also a businesswoman. BBC Russia identified her as co-owner of a company planning to build a massive medical centre.
Mrs Vorontsova is married to Dutch businessman Jorrit Joost Faassen, who once worked at Russian state energy giant Gazprom, although they have reportedly separated.
People who have spoken to her since the Ukraine invasion say she supports her father, and has cast doubt over international reporting of the conflict.
Compared to her sister Katerina Tikhonova has been much more in the public eye, not least due to her talents as a rock n' roll dancer. She and her partner came fifth at an international event in 2013.
That same year, she married Kirill Shamalov, the son of a long-time friend of President Putin. Their wedding was held at an exclusive ski resort near St Petersburg. Workers there said the couple arrived on a sleigh drawn by three white horses.
General Muhoozi-My wife is the most beautiful woman on earth