LONDON — Queen Elizabeth attended a private ceremony to celebrate the christenings of two of her great-grandchildren on Sunday, the British news agency PA reported, four days after the 95-year-old monarch made her first public appearance since a hospital stay.

One was of the baby son of Princess Eugenie, daughter of the queen’s third child Prince Andrew

The other was of the third child, a son, of Zara Tindall, daughter of the queen’s second child Princess Anne