Roman Abramovich has named his new son Aaron Alexander Abramovich after his late father Arkady, whose Jewish name was Aaron.
Mr Abramovich's father was killed in a construction site accident in Russia when the billionaire Chelsea owner was just four years old.
Daria Zhukova gave birth at Los Angeles’ Cedar-Sinai Medical Center last Thursday. The hospital is close to where the former model grew up and her Jewish mother Elena’s home. Ms Zhukova attended a Jewish school in California as a teenager.
It is not known whether Aaron has yet had a brit, but Ms Zhukova recently told The Guardian that Judaism is “the religion I connect with most”. The baby is also named after her father, the oligarch Alexander Zhukov, who is a practicing Christian based in London.