Remy (Friend of the Family)
From Tardis Wiki, the free Doctor Who reference
Remy was a concierge at a hotel in Switzerland. He entered into a relationship with George Mortimer, who kept him secret for some time.
George pretended that the Valentine's card that Remy sent him was from River Song but, before returning to Switzerland, he told Mary Mortimer about him. Following George's death in a skiing accident, Remy and Mary remained in touch and he sent her a copy of The Midnight Waves. (AUDIO: Friend of the Family)