The Gilded Age Wiki

Dr. William Kirkland (portrayed by Jordan Donica) is an upcoming character in season 3. He is the son of the prominent Kirkland family. He's described as a kind and handsome doctor who's inspired to help others after visiting a pharmacy as a boy. He's the son of Frederick Kirkland and Elizabeth Kirkland.

He meets Peggy Scott for the first time in the second episode of Season 3, What the Papers say, when he's called to take care of her when she falls ill.