Latimer (The Snowmen)

 was a wealthy widower in the late 19th century and the father of Digby and Francesca. Among his household staff were maid Alice and governess "Miss Montague" (an alias of Clara Oswald) whom he hired after the drowning death of his children's prior governess. He found himself quite impressed by, and attracted to, Montague/Oswald, but declined to act upon his attraction.