New Delhi, Feb. 20 -- He was reportedly his mother Queen Elizabeth II's favorite, but the former Prince Andrew has long been a headache for Britain's royal family.

Andrew Mountbatten-Windsor was arrested Thursday, his 66th birthday, on suspicion of misconduct in public office in an inquiry stemming from his relationship with Jeffrey Epstein. He is the first senior British royal to be arrested since King Charles I, almost 400 years ago.

Born a prince in 1960, Andrew is the third child and second son of the queen and her husband Prince Philip. His elder brother Charles was destined for the throne. Andrew took a tried-and-tested route for younger royal sons: military service.

After 22 years in the Royal Navy, including combat operations a...