Who did valentine write a letter to signed from your valentine?

Valentine, a Christian martyr, is believed to have written a letter to the jailer's daughter, who he had befriended and healed during his imprisonment. According to legend, he signed the letter "From your Valentine," which is thought to be the origin of the modern Valentine's Day tradition of sending affectionate messages. This act of love and kindness has since become emblematic of the holiday, celebrating romantic relationships.