What's the connection between Vikram Kothari's and Nirav Modi?

Ever since the beleaguered billionaire and Diamond merchant Nirav Modi, the accused in the multi-crore Punjab National Bank scam fled the country, people are eager to know who is this Nirav Modi and there are some shocking facts revealed about his relationship with the Ambani family.

Modi’s brother, Neeshal Modi is married to Isheta Salgaonkar, the niece of Mukesh Ambani and Anil Ambani.
Isheta is the daughter of prominent Goa industrialist Dattaraj Salgaonkar. Salgaonkar is the husband of Mukesh Ambani’s sister Dipti.

Reports also claim that Modi’s chief financial officer Vipul Ambani is the son of Dhirubhai Ambani’s youngest brother Natubhai Ambani.