St. Dymphna was killed in the year 650, and was only around 15 years old.
There is no patron saint of emotional difficulties or problems but St. Jude is the patron of difficult situations.
Roman Catholic AnswerSt. Dympha is patron for the mentally ill, St. Drogo of the deaf, ill, deformed, St. Giles is patron for the disabled, St. Nicholad of Myra, St. Raymond Nonnatus, and St. Nicholas of Tolentino for children. The below link is for all the patron saints for the handicapped.
Saint Agnes was martyred in Rome.
Saint Oda died in 726.
Saint Non died in 5##.
Saint Pothinus died in 177.
Saint Ame died in 630.
Saint Sabina died in 126.
Saint Astius died in 117.
Saint Kea died in 5##.
Saint Lie died in 533.
Saint Mercurius died in 250.