Dhaka, Aug. 22 -- Thailand's billionaire Shinawatra family is bracing for a series of high-stakes court decisions starting Friday that could test its political resilience, with the prospect of an early election and prolonged trouble for the country's stuttering economy.

Thailand's Shinawatra political dynasty has been at the heart of two decades of intermittent turmoil and its latest battles will culminate in rulings that could unseat Prime Minister Paetongtarn Shinawatra for an alleged ethics violation and put her influential but polarising father Thaksin Shinawatra back in prison.

A court will on Friday rule if Thaksin during a 2015 media interview insulted the powerful monarchy, a serious crime in Thailand which carries lengthy jail ...