What is known about Jamnagar's royal family as Ajay Jadeja is declared heir?

Ajay Jadeja will be the next Jam Saheb of Nawanagar, a princely state in Gujarat now called Jamnagar. The royal family is well known in political and cricketing spheres. Ajay's father Daulatsinhji Jadeja served as Member of Parliament from Jamnagar Lok Sabha three times. The esteemed Ranji Trophy and Duleep Trophy are named after his relatives–KS Ranjitsinhji and KS Duleepsinhji.