Saraf family

“It should be noted that most of the prominent Marwari families in fact come from the Shekhawati region consisting of the following districts: Jhunjhunu, Sikar, and a part of Bikaner. For example, these include the Birla from Pilani, the Singhania from Bisaw, the Dalmia from Chirawa, and the Saraf from Mandawa (see Map).”

Hometowns of the Marwaris, Diasporic Traders in Indiasrc-h.slav.hokudai.ac.jp

“Chirawa and Nawalgarh (today towns in modern-day Jhunjhunu district of Rajasthan) have for some reason historically produced the largest concentration of prominent Marwari business families. The Dalmias, for example, are from Chirawa itself, while the Birlas are from Pilani, a distance of 17 kilometres. Nawalgarh, which produced the Goenkas, Khaitans, Poddars, Kedias, Ganeriwalas and Murarkas, is only 60 kilometres away. The Singhanias, Bajajs, Mittals, Ruias and Sarafs hail from other nearby towns and villages.”

Marwaris' unique talent for business comes from one quality. It's called 'baniya buddhi'theprint.in

“The community’s famous basa system set up by established businessmen (like Nathuram Saraf, considered one of the first Marwaris to migrate to Kolkata, and who worked as a broker with Kinsell and Ghosh) helped new migrants live for free or minimal charges in accommodation that resembled hostels until they could sustain themselves. There are records, for example, of Shiv Narain Birla (grandfather of industrial giant GD Birla) living in a basa when he first came to Mumbai in the late 19th century.”

The Evolution of Risk-Taking Marwari Businessmenforbesindia.com